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Find the period of \[f(x)) = 4 sin^2x + 7 cos^2 x\]



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Ishaan94
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My guess is \(\pi\).

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Yup...@Ishaan94 u r correct

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Can u ....Solve this....@Ishaan94

Ishaan94
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Period of \(b\sin^2x + a\cos^2x\) is same as \(c\sin^2x\). Use \(\sin^2\theta + \cos^2\theta = 1\).

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Did nt get u @Ishaan94

Ishaan94
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\[4\sin^2x + 7\cos^2x = 4  11 \cos^2x\]
Since \(\cos ^2x\)'s period \(\pi\), \(4  11 \cos^2x\) would \(\pi\) as well.

Ishaan94
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... would be* ...

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Yes...thxxxx