Question: If sin = 1/3, /2 < < , and cos = -1/3, < < 3/2, find the exact value of: (a) cos

If sinα = 1/3, π/2 < α < π, and cosβ = -1/3, π < β < 3π/2, find the exact value of:

(a) cosα

(b) sinβ

(c) cos(2α)

(d) cos(α + β)

(e) sin β/2

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