Use the information given about the angles and to find the exact value of: (a) sin( +
Question:
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
cosα = 4/5, 0 < α < π/2; cosβ = 5/13, π/2 < β < 0
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