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what is the periof of modulus of sin(x)cos(x)

Avinash k , 10 Years ago
Grade 12
anser 2 Answers
Sunil Kumar FP

Last Activity: 10 Years ago

period of sinx and cos x is 2pi
modulus of sinx *cosx
=2*sinxcosx/2
=2*modulus of sin2x
period of sin2x=2pi/2=pi

thus its period is pi

Jitender Singh

Last Activity: 10 Years ago

Ans:
Hello Student,
Please find answer to your question below

f(x) = |sin(x)cos(x)|
f(x) = |\frac{2}{2}.sin(x)cos(x)|
sin2x = 2sin(x)cos(x)
f(x) = |\frac{sin2x}{2}|
Period of f(x) = sin2x
\frac{2\pi }{2} = \pi

Since we are taking the modulus, then negatib=ve part of the graph will come on +ve side which is similar to the +ve positive side. So period will be reduce by half.
Period of f(x) = |sin2x/2|
\frac{\pi }{2}

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