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Question

What is the slope of the tangent to the curve y=sin−1(sin2x) at x=0 ?

A
0
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B
1
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C
2
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D
None of the above
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Solution

The correct option is A 0
Slope of tangent to a curve f(x), at a point (xo,yo) is given by f(x),
where f(x) is derivative of f(x) at x=xo
f(x)=sin1(sin2x)
xo=0
f(x)=df(x)dx=df(x)dsin2x×dsin2xdsinx×dsinxdx
f(x)=11sin2x×2sinx×cosx
f(0)=0
Slope of tangent to the curve is 0

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