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HorribleAtMath
Group Title
for sin, cos, tan, csc, sec, and cot functions, how do you find the angles?
 2 years ago
 2 years ago
HorribleAtMath Group Title
for sin, cos, tan, csc, sec, and cot functions, how do you find the angles?
 2 years ago
 2 years ago

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HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
i know you type in the calculator inverse sin..etc but like how do you know which quadrants they are in
 2 years ago

y2o2 Group TitleBest ResponseYou've already chosen the best response.1
the inverse functions \[\sin^{1} or \space \cos^{1} or \tan^{1} \] and so on
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
i know that
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
but how do you know which quadrant
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
once you find that reference angle
 2 years ago

y2o2 Group TitleBest ResponseYou've already chosen the best response.1
Ah, ok i got it
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.0
Just remember that the cos is like x and the sin is like y. That gives you the sign of all the functions in all the quadrants.
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
hmmm still sorta confused. can you give me an example mertsj?
 2 years ago

y2o2 Group TitleBest ResponseYou've already chosen the best response.1
you have to check the value of the function in the first quad. all functions are positive in the second quad. sine is the only positive the rest are negative in the third quad. tan is the only positive the rest are negative in the fourth quad. cosine is the only positive the rest are negative so when you find the angle , you can determine in which quad it is.
 2 years ago

y2o2 Group TitleBest ResponseYou've already chosen the best response.1
dw:1332718026574:dw
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
ok so like if i have sin x = 1/2
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.0
dw:1332717956955:dw
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
so if i have sin = 1/2 that means y= 1 and R = 2
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
so then it would be first quadrant and third quadrant ?
 2 years ago

y2o2 Group TitleBest ResponseYou've already chosen the best response.1
for example if sin(x) = 0.5 and x belongs to [0,180] then x must be in the first or the second quad. because it's +ve and sin^1(0.5) = 30 so x =30 or x = (18030 = 150)
 2 years ago

y2o2 Group TitleBest ResponseYou've already chosen the best response.1
sorry x belongs to [0,360]
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
uhhhh..
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
for sin3x = 1/2 why is the answer pi/18 and 5pi/18 ?
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.0
\[3x= \frac{\pi}{6}, \frac{5\pi}{6}\] \[x=\frac{\pi}{18}, \frac{5\pi}{18}\]
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
but why
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.0
3x=1/6 What is x?
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.0
dw:1332719500565:dw
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.0
dw:1332719528422:dw
 2 years ago

HorribleAtMath Group TitleBest ResponseYou've already chosen the best response.0
lol 1/18
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.0
dw:1332719572812:dw
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.1
dw:1332723649132:dw
 2 years ago

precal Group TitleBest ResponseYou've already chosen the best response.1
This is how I remember it: All Students Take Calculus It helps you remember which functions are positive. Quadrant 1 : They are all positive
 2 years ago
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