Friday

August 26, 2016
Posted by **Hannah** on Friday, March 5, 2010 at 12:55pm.

cos^2 [(pi/2) - x] / cos x

Does csc x match with this?

- Math -
**Reiny**, Friday, March 5, 2010 at 1:02pmcos(pi/2-x) = sinx

(e.g. cos 70 = sin 20)

[cos^2 (pi/2-x)]/cosx = sin^2 x/cosx

= (sinx/cosx)sinx

= tanxsinx

Don't know what you mean by "match with this"