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Question

Differentiate y=sin1(a+bcosxb+acosx) w.r.t x.

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Solution

y=sin1(a+bcosxb+acosx)
siny=a+bcosxb+acosx
cosydydx=(b+acosx)d(a+bcosx)dx(a+bcosx)d(b+acosx)dx(b+acosx)2
=(b+acosx)(bsinx)(a+bcosx)(asinx)(b+acosx)2
=b2sinxabsinxcosx+a2sinx+absinxcosx(b+acosx)2
siny=(a2b2)sinx(b+acosx)2
y=sin1⎜ ⎜(a2b2)sinx(b+acosx)2⎟ ⎟

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