# Math Help - Help with a Trig Identity Problem

1. ## Help with a Trig Identity Problem

If we establish an identity, sinAcscA - sin2A could equal which of the following quantities?

1
cos^(2) x A
sin^(2) x A – 1
tan^(2) x A

thanks

2. Originally Posted by andy11
If we establish an identity, sinAcscA - sin2A could equal which of the following quantities?

1
cos2A
sin2A – 1
tan2A

thanks
$sin(A)csc(A) - sin^2(A)$<-- I had to be a bit of an oracle here!

$= \frac{sin(A)}{sin(A)} - sin^2(A)$

$= 1 - sin^2(A) = cos^2(A)$

-Dan