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फलन tan x का x के साक्षेप अवकल गुणांक ज्ञात कीजिए । |
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Answer» ज्ञात है कि ` tan x = ( sin x) /( cos x) " अतएव "d/(dx) tan x = d/(dx) ( (sinx)/cosx)` ` d/(dx) tan x = ( cos x d/(dx) ( sin x) - sin x d/(dx) ( cos x) )/( cos^x)^(2)` ` (cos x ( cos x) - sin x ( sin x))/( cos^(2) x) ` ` = ( cos^(2) x + sin^(2) x )/( cos^(2) x) = 1/( cos^(2)) = sec^(2)` इस प्रकार ` d/( dx) tan x = sec^(2) x.` |
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