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Posted by **Kate** on Sunday, July 17, 2011 at 7:01pm.

a)tan^2x = 1 – cos^2x/cos^2x

b)sinx/1 – sin^2x = tanx/cosx

- Math -
**Reiny**, Sunday, July 17, 2011 at 7:19pma)

RS = sin^2x/cos^2x

= LS

b) LS = sinx/cos^2x

= (sinx/cosx)/cosx

= tanx/cosx

= RS