(cosecA+sinA) (cosecA-sinA)=cot²A+cos²A
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Step-by-step explanation:
(cosecA+sinA) (cosecA-sinA)
= cosec²A - sin²A
= 1+cot²A - (1-cos²A)
= 1+cot²A -1 + cos²A
= cot²A + cos²A
Hence proved.
Formula:
sin²A + cos²A = 1
cosec²A - cot²A = 1
hope you are satisfied with the solution.
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