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

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

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

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

HorribleAtMath
 3 years ago
Best ResponseYou've already chosen the best response.0once you find that reference angle

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Just 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.

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

y2o2
 3 years ago
Best ResponseYou've already chosen the best response.1you 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.

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

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

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

y2o2
 3 years ago
Best ResponseYou've already chosen the best response.1for 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)

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

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

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

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