Saturday

October 25, 2014

October 25, 2014

Posted by **Amanda** on Sunday, April 22, 2012 at 6:21pm.

cos^2(x/2)-sin^2(x/2)

2sin(x/2)cos(x/2)

**Answer this Question**

**Related Questions**

Pre-Cal - 1) Verify the identity cos^2 B - sin^2 B = 2 cos^2 B -1 I know that ...

Trigonometry - I need to prove that the following is true. Thanks. csc^2(A/2)=...

Trigonometry - Identities - If tan 2x = - 24/7, where 90 degrees < x < 180...

Math 2nd question - Express as a single sine or cosine function (note: this is ...

pre-calc helpppp - Simplify the expression by using a Double-Angle Formula or a ...

Pre-Calc Help!!! - Simplify the expression by using a Double-Angle Formula or a ...

Math - 1. use the suitable product-to-sum formula to rewrite the following ...

Trig Help! - Question: Trying to find cos π/12, if cos π/6 = square ...

Trig - If cosx = 10/19 an pi < x < 2pi, find the exact value of cos x/2 ...

trigonometry (please double check this) - Solve the following trig equations. ...