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anonymous
 5 years ago
3x^27x3=0
anonymous
 5 years ago
3x^27x3=0

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.03times3 is 9 which doesnt factor into 7.... so quadratic it :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0after using the quadratic formula, how do you complete the problem?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0that is the completed problem. you could try doing the "complete the square" method; but all that method does is prove that the quad formula works.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0my textbook says to find the nearest degree.. x = sin of theta

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0then find what x equals and take the sine inverse of it. the inverse trig funtions take numbers for inputs and spit back angles. Does that make sense?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0lets walk you thru it then :) first get the values for x with the quad formula. 7/6 (+) sqrt(49(4)(3)(3))/ 6 7/6 (+) sqrt(49+36)/6 7/6 (+) sqrt(85)/6 you with me so far?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0the quad form reads: middle (+) sqrt(middle^2 4(first)(last)) all over 2(first). or more formally: b (+) sqrt(b^24(a)(c))  2(a) right? 7 times 7 = 49

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh. it's b^2? no wonder i never got any solution out of that. thank you very much! +5

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0we got numbers for our x now; (7/6 (+) sqrt(85)/6) if I did it correctly right?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0umm.. i'm still solving it. i got the b^2 correct

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0my calculator says 49 instead of 49. so weird～

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0lol.... maybe user error? To find out what sin(t) is when x equals some number we write it like this: sin(t) = x To find out what "t" is we need to get rid of the (sin) part. And we do that by using what is called the sine inverse function.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i think it was supposed to be 7 not 7

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0all it changes in the end is the sign of (7/6) to (7/6) which may or may not be an issue

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0got it. \[x=7\pm \sqrt{49+36} \div 6\]

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0if your equation you gave was correct, then it was supposed to be (7)^2 = 49. But (7)^2 = 49 just the same

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0good :) you ready to learn about sin inverse? its symbol is (sin^1)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i know sin^1 but i'm stuck in where should i go next.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0lets walk it thru. It asks us to find sin(t) = x right?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0theta is simply a name, I will make it simpler and just name it "t" do you think I can do that?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0lol...good, mathmaticians like to rename things all the time, makes them feel important :)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0we have: sin(t) = x we need to get rid of the "sin" part. So lets apply sin^1 to each side to get: t = sin^1(x) Now plug the numbers into your scientific calculator to get an angle for t, formally known as theta

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wait. i'm confused here. do i continue with the quad. formula?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0the quad formula simply gave us the values for x....its job is done and it can go take a well deserved break...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so i continue with this:\[3\sin^2\theta7\sin \theta3=0\]

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0aha!!! you were holding back vital information...hmmm

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0opps.. am i in trouble?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0nah....just makes the problem more understandable now :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0XD. so how do i continue?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0just the same as before :) sin(t) = x and solve for t But I gotta tell wonder, do you have the problem written correctly becuase I get some wierd stuff when I plug it into the calculator..

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the textbook says to use the quadratic formula to find,to the nearest degree, all values of theta in the interval 0 degrees [less than or equal to] theta [less than] 360 degrees that satisfy each equation.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0338.29 degrees is what I get, which is in Quad4 but it is also hiding in Quad3 under the disguise of 201.71 degrees.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0[7+sqrt(85)] /6 is greater then 1 so it spits out an error. x = 2.7 and that aint between 1 and 1 so it is a false reading.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0[7sqrt(85)]/6 = 0.3699 which IS between 1 and 1 so it is a good value of x.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0is there anyway to verify the answer?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i got the same answer as you. 0.3699240762

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0either were both geniuses or were both idiots...take your pick :)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0the thing about sin^1 is that it only gives an angle that is on the right hand side of a circle. So you have to remember to look over to the other sid eto see where it matches up at.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0does any of that make sense to you?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0somewhat, let me think over~

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i think i got it, thanks for helping me though(:
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