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Grade 12Integral Calculus

Check the monotonicity of f(x)=x÷sin x in (0,p÷2)

Profile image of KOTAKONDADINESH
12 Years agoGrade 12
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1 Answer

Profile image of Sher Mohammad
12 Years ago
f'(x)=sinx-xcosx/(sinx)^2

for small x, sinx=x
f'(x)=x(1-cos x)> greater than zero
for higher values of x, also f'(x)>0, hence the function f(x) is monotonically increasing.

Sher Mohammad
B.Tech, IIT Delhi