It is given that cos(θ+α) = p and sin(θ+β) = q
a) Express cos θ and sin θ in terms of α, β, p and q.
b) Hence, prove that p² + q² + 2pq·sin(α-β) = cos²(α-β).
trigo
2012-04-28 1:34 am
回答 (1)
2012-04-28 2:00 am
收錄日期: 2021-04-13 18:39:36
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