The equation of the normal to the curve y=(1+x)y+sin-1sin2x at x=0 is
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a
x+y=1
b
x+y+1=0
c
2 x-y+1=0
d
x+2 y+2=0
answer is A.
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Detailed Solution
Given y=1+xy+sin−1sin2xWhen x=0,y=1To get the slope of the tangent, differentiate both sides dydx=1+xydydxlog1+x+y1+x+sin2x1−sin4xdydx|0,1=1The slope of the normal is −1Equation of the normal is x+y−1=0