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)

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