Question

if cos alpha=8/17,sin beta=5/13 find sec( alpha+ beta).​

Answer 1

Answer:$cos(α+β)=45 sin(α−β)=513 sin(α+β)=35 α−β=sin−1(513) α+β=sin−1(35) 2α=sin−1(513)+sin−1(35) sin(2α)=5665tan(2α)=5633$

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