Math, asked by srinija0419, 5 months ago

The period of 3 sinº x +5 cos? x is​

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Answered by hanshu1234
2

Answer:

We have,</p><p>(x)=sin4x+cos4x</p><p></p><p></p><p>⇒(x)=(sin2x)+(cos2x)22sin2xcos2x</p><p></p><p>⇒(x)=(sin2x+cos2x)2−21(2sinxcosx)2</p><p></p><p></p><p>⇒(x)=1−21{sin22x}</p><p></p><p></p><p>⇒(x)=1−21{21−cos4x}</p><p></p><p>⇒(x)=43−41cos4x.</p><p></p><p>Since cos4x is a periodic function with period 42π=2π</p><p></p><p>So, (x) is periodic with period 2π.</p><p></p><p>

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