Question

EMERGENCY PLEASE HELP ITS FOR A TEST what is the trigonometric identities for cos^2x-1= and also cot^2x+1=

Answer 1

Please help me I have less and less time left to know this

Answer 2

is it a double angle ?

Answer 3

not sure

Answer 4

i need to know what are the trigonometric identities for those two though.. im stuck..

Answer 5

cos 2x = 1 - 2sin^2 x

Answer 6

thanks for that one

Answer 7

hey are you still there

Answer 8

what ?

Answer 9

can u help me with the second part
with the cotangent

Answer 10

\[1 + \cot ^{2} x = \tan ^{2} x\]

Answer 11

thanks rajabhishek ur like the life saver right now