if f(x)= log (sec x + tan X) find f(x)
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Step-by-step explanation:
f'(x)= log (1/cosx+sinx/cos x)
= log(1+sinx/ cos x)
= log (1+ sinx )-log cos x
= 1/(1+ sinx)×cosx- 1/cos x×- sinx
= cos x/ (1+sinx) + sinx/cos x
cos x/ ( 1+ sin x)+ tanx
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