Posted by **Stephanie823** on Saturday, March 10, 2012 at 9:26pm.

Use one of the identities

cos(t + 2ðk) = cos t or sin(t + 2ðk) = sin t to evaluate each expression. (Enter your answers in exact form.)

(a)

sin(17ð/4)

(b)

sin(−17ð/4)

(c)

cos(17ð)

(d)

cos(45ð/4)

(e)

tan(−3ð/4)

(f)

cos(7ð/4)

(g)

sec(ð/6+2ð)

(h)

csc(2ð −ð/3)

## Answer This Question

## Related Questions

- Pre Calculus - Use one of the identities cos(t + 2ðk) = cos t or sin(t + 2ðk) = ...
- Precalculus - Use one of the identities cos(t + 2πk) = cos t or sin(t + 2&#...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- algebra - Can someone please help me do this problem? That would be great! ...
- 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 ...
- trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
- Math - Calculus - The identity below is significant because it relates 3 ...
- Pre Calculus - Multiply; then use fundamental identities to simplify the ...
- Trig! - The identities cos(a-b)=cos(a)cos(b)sin(a)sin(b) and sin(a-b)=sin(a)cos(...

More Related Questions