Prove this:
cosA / 1 - sinA + cosA / 1 + sinA = 4
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Step-by-step explanation:
RHS is wrong.
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Answer:
4
Step-by-step explanation:
cosA/1-sinA + cosA/1+sinA=4
cosA(1/1-sinA+1/1+sinA)=4
cosA(1+sinA+1-sinA)/(1-sinA)(1+sinA)=4
cosA×2/cosA²=4
2secA=4
secA=2
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