Wednesday

October 22, 2014

October 22, 2014

Posted by **Anonymous** on Tuesday, September 17, 2013 at 11:23pm.

- Trig -
**Reiny**, Wednesday, September 18, 2013 at 12:13amWell, why not follow that hint

sin(-15) = sin(30 - 45)

= sin30cos45 - cos30sin45

= ....

You should know the trig functions of those special angles.

**Answer this Question**

**Related Questions**

trig 26 - simplify to a constant or trig func. 1. sec ²u-tan ²u/cos ²v+sin ²v ...

math - Find the exact value of cos 300 degrees. thanks guys cos 300 = 1/2 = 0....

trig - Show that 1-cos2A/Cos^2*A = tan^2*A 1-cos2A/Cos^2*A = [Cos^2(A) - Cos(2A...

trig - 2sin(4x)[(cos(3/2)x)(cos(5x/2)-sin((15/4)x)]+x can someone simplify this ...

Trig - Simplify (sin^2)*(67.5deg) - (cos^2)*(67.5deg) and then evaluate exactly...

trig integration - s- integral endpoints are 0 and pi/2 i need to find the ...

Inverse Functions & Trig. Equations - 7. Evaluate sin[sin^-1(-1/2)]. a. 1/2 b...

Precal - I do not understand how to do this problem ((sin^3 A + cos^3 A)/(sin A...

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

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