7. sin A(1 + tanA) + cos A(1+ cotA) = secA + cosecA.
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Answer:
sinA(1+tanA)+cosA(1+cotA)=
sinA+sin^2A/cosA+cosA+cos^2A/sinA=
sinA+(1-cos^2A)/cosA+cosA+(1-sin^2A)/sinA=
1/cosA+1/sinA=
secA+cosecA
Step-by-step explanation:
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