Friday

March 6, 2015

March 6, 2015

Posted by **Gina** on Wednesday, November 11, 2009 at 3:32pm.

- Trig -
**Reiny**, Wednesday, November 11, 2009 at 4:36pmYou should have come across the identity

cos 2x = 1 - 2sin^2 x

so

cos 2x = 1 - A^2

**Answer this Question**

**Related Questions**

TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...

trig - The expression 4 sin x cos x is equivalent to which of the following? (...

trig 26 - simplify to a constant or trig func. 1. sec Ču-tan Ču/cos Čv+sin Čv ...

pre calc trig check my work please - sin x + cos x -------------- = ? sin x sin ...

trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...

algebra - Can someone please help me do this problem? That would be great! ...

trig 30 - For csc^2 A-1/cot A csc A, what is the simplest equivalent trig ...

calculus/Trig - Suppose you wish to express sin(3t) in terms of sint and cost. ...

trigonometry HELP pleasE! - these must be written as a single trig expression, ...

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...