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प्रश्न
Prove the following
`(tan (90 - A) cot A)/(cosec^2 A) - cos^2 A =0`
उत्तर
Tan (90 – A) = cot A
`=> (cot A.cot A)/(cosec^2 A) - cos^2 A`
`=> cot^2 A/cosec^2 A - cos^2 A`
`=> cos^2 A/sin^2 A - cos^2 A => cos^2 A cos^2 A = 0`
Hence proved
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