prove that Cos A upon 1 minus 10 A + sin a upon 1 minus cot a is equal to Sin A + Cos A
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Step-by-step explanation:
cosA/1-tanA + sinA/1-cotA
=cos²A/cosA-sinA + sin²A/sinA-cosA
=cos²A/cosA-sinA - sin²A/cosA-sinA
=(cos²A-sin²A)/cosA-sinA
using (a²-b²)=(a-b)(a+b)
=sinA+cosB
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Answer:
here is the answers
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