Question

Simplify the expression.
Precalc. I have to draw the question

Answer 1

is that cos 2x or \(cos^2 x \) ??

Answer 2

cos2 x
the second one

Answer 3

there are basic identities
like cos^2 x + sin ^2x =1
know them ?

Answer 4

no
i have no idea what im doing. just trying to get some help & finish my class.

Answer 5

cos^2 x + sin ^2x =1
and cot ^2 x - csc^2 x = -1
so 1/-1 = -1

Answer 6

so the answers 1?

Answer 7

-1

Answer 8

youre awesome(:

Answer 9

can you help wit hanother

Answer 10

no, i am not ! you are :)
yes, sure.

Answer 11

cosθ - cosθ sin2θ

Answer 12

cos x -cos x sin^2 x
= cos x (1- sin^2 x)
= cos x (cos ^2 x)
= cos^3 x

Answer 13

Find sinθ if cot θ = -2 and cos θ < 0 ?

Answer 14

???????