Prove frac{cos(a)}{1+sin(a)}+(1+sin)

illusiia 2020-11-09 Answered
Prove cos(a)1+sin(a)+(1+sin)
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Expert Answer

2k1enyvp
Answered 2020-11-10 Author has 94 answers

cos(a)1+sin(a)+1+sin(a)cos(a)
=(1+sin(a))2+cos2(a)(1+sin(a))cos(a)
=(1+sin(a))2+1sin2(a)((1+sin(a))cos(a)
=2cos(a)=2(1sec(a))=2sec(a)

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