Question: Use the information given about the angles and to find the exact value of: (a) sin( + ) (b) cos( + ) (c) sin( -

Use the information given about the angles and to find the exact value of: 

(a) sin(α + β)

(b) cos(α + β)

(c) sin(α - β)

(d) tan (α + β)

(e) sin(2α)

(f) cos (2β)

(g) sin β/2

(h) cosα/2


sinα = -3/5, π < α < 3π/2;     cosβ = 12/13, 3π/2 < β < 2π

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