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Question

If y=tan[log(x2)], then dydx is -

A
2x sec2[log(x2)]
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B
2 sec2[log(x2)]x
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C
x sec2[log(x2)]
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D
1x2sec2[log(x2)]
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Solution

The correct option is B 2 sec2[log(x2)]x
y=tan[log(x2)] differentiate w.r.t x
dydx=ddx[tan{log(x2)}]
dydx=sec2(log x2).ddx[log(x2)]
dydx=sec2(log x2).1x2.ddx(x2)
dydx=sec2(log x2).1x2.2x
dydx=2x.sec2(log x2)

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