Posted by **Natash** on Saturday, November 15, 2008 at 2:40am.

Give exact answers

Sin(11pi/8)

so this is sin(pi/4+pi/3)

sin(pi/4)*cos(pi/3)+cos(pi/3)*sin(pi/4)

rad2/2*1/2+1/2*rad2/2

which gives me rad2+rad2 all over 4 ...i dont know y im getting it wrong

## Answer this Question

## Related Questions

- trig - inverse cos (-rad2/2)=135 degrees inverse sin (-rad2/2)=-45 degrees I ...
- TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
- tigonometry - expres the following as sums and differences of sines or cosines ...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- 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! ...
- Math - Calculus - The identity below is significant because it relates 3 ...
- Trig - Find sin(s+t) and (s-t) if cos(s)= 1/5 and sin(t) = 3/5 and s and t are ...
- pre calc trig check my work please - sin x + cos x -------------- = ? sin x sin ...
- Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...

More Related Questions