Question

identify the identity
sec^2 [(pi/2) - x]- 1= cot^2 x
please help!

Answer 1

there it is...

Answer 2

write that left side as \[\large \frac {1}{\cos^2( \frac {\pi}{2}-x)}-1\]

Answer 3

then try using the sum/difference formulas for sin/cos...

Answer 4

thanks!