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anonymous
 4 years ago
the rectangular box has a 2x2 base and height of 1. cosine of angle between AC and AB is...
anonymous
 4 years ago
the rectangular box has a 2x2 base and height of 1. cosine of angle between AC and AB is...

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0hints please, trying to solve on my own...

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.2We need to see the rest of the problem

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.2I know and it's not on that either

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0you sure? i'm pretty sure it's solveable, just can't remember how...i believe the angle between the vector and AB (i'll label x axis) would be roh(?)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0divide the problem into two right triangles

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0elica85. First, project the line down onto the base square of the triangle. Find the hypotenuse of the triangle that is formed by doing this. This is our adjacent quantity. We know the opposite quantity. Now we can use the tangent function.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0whoops. project the line down onto the base rectangle of the prism! sorry

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0or use dot product of AC with AB

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.2The cosine of the angle is 2/3

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok, the dot product gives me the cosine? anything else i need to do after? and why dot produvct?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0because it gives you the cos of the angle, which is what you are trying to solve for

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327112719359:dwthe dot product of A and B is C

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so,\[A*B=ACAB\cos \theta\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0let me know if you need more help from here

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Sorry I should have wrote \[AC*AB=ACAB\cos \theta\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thx, still trying to understand...first how do i get AC...it would be sqrt(1^2+?^2)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0AC=<2,2,1> so AC=(2^2+2^2+1^2)^1/2

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok...i saw that dot product formula quite a few times but i don't get it. <AB>dot<AC>=ABAC...and multiplied by cos...

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yeah, exactly. ABACcosa, where a i the angle between vectors AB and AC

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0do you remember how to calculate the dot product part?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes. mult component wise and then add

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok so have that on the left side...and then solve for cosa

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok ok. so use sina if the question asks to find the sine of the angle?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0no..the dot product only gives you cosines

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so if i'm asked for sine...?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then you need to use another relation. if you have corresponding angles for example, you can relate the cos of one angle to the sin of another.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok, thx you closed the gap a lot for me just from this problem

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0or the question might involve the crossproduct of two vectors which involve the sin of the angle between the two vectors..depends on the problem

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i get .84 but the closest out of the choices i have is 2/sqrt(5)...or none of the above
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