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Tansquare20-sinsquare20/ tansquare20. sinsquare20 solve this
tan220-sin220/tan220sin220divide and multiply by tan220=1-cos220/sin220 ( sin220/tan220 = cos220 )=sin220/sin220=1
tan2 20o -sin2 20o/tan2 20o.sin2 20o=tan2 20o/tan2 20o.sin2 20o – sin2 20o/tan2 20o.sin2 20o=1/sin2 20o – 1/tan2 20o=cosec220o – cot220o=1 [Since,cosec2x– cot2x=1]
= = = 1Hope it helps!with regards,SoumenduFor any confusion feel free to askI would clear the doubts if you have any problem understanding
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