Question

can someone simplify this for me

Answer 1

\[\cos ^{2}\theta(\sec ^{2}\theta-1)\]

Answer 2

sec^2 = 1/cos^2

Answer 3

cos^2θ(sec^2θ−1)
cos^2θ(1/cos^2θ−1)
(cos^2θ/cos^2θ-cos^2θ)
(1-cos^2θ)
sin^2θ

Answer 4

so its sin^2(theta)?
since the answer is 1-cos^2(theta)

Answer 5

okay thanks

Answer 6

the identity sin^2 + cos^2 = 1
sin^2 = 1 -cos^2

Answer 7

what about cosx/1+tan^2x ?

Answer 8

i dont knwo what to do after i change the tan^2 to sin^2x/cos^2x