Find the exact value of each trigonometric expression.

Your answer may not contain trigonometric functions.
A) sec(23/3π)
B) csc(23/3π)

(23/3)π=7 2/3π-2π-2π-2π=(5/3)π =>300deg.
A) sec(23/3π)=1/cos 300deg = 1/(1/2) = 2
B) csc(23/3π)=1/sin 300deg. =1/(-√3/2) = -2/√3