Pre Calculus

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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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