Question

sin(cos^-1x)

Answer 1

let cos^-1 x = u
so, cos u =x
so u just need
sin u , from cos u =x.....

Answer 2

know the relation between sin and cosine ?

Answer 3

no ?
\(\large \sin^2 x+\cos^2x=1\)

Answer 4

I suck at Calc and dont know im doing it correctly

Answer 5

And I dont know the relation

Answer 6

tell me whether you can get sin u
knowing that cos u = x
from the relation, sin^2 u +cos^2 u =1

Answer 7

now you know :)

Answer 8

Thanks

Answer 9

The easiest method to use in this type of problem is to draw a picture.

\[\cos^{-1} x\] implies that someone took the cosine of an angle and got the number x. What would the triangle look like?
Now, using the Pythagorean Theorem, figure out the side opposite the angle and calculate the sin Note that you never have to calculate the angle.

This works for all 6 trig functions.

Answer 10

Okay Kool. Thanks