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## anonymous 4 years ago Find the Period of $2 cos^3 x + 5cos4x$

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1. anonymous

$$\cos^3x$$'s period is $$2\pi$$ and $$\cos 4x$$'s period is $$\pi/2$$. The period for the given equations should be $$2\pi$$.

2. anonymous

equation*

3. anonymous

lol....u seems to find the answer easily

4. anonymous

any trick behind that

5. anonymous

Practice. :-)

6. anonymous

in my...book the soln is given half a page

7. anonymous

@Ishaan94 hw cos^3 x period is 2 pie

8. anonymous

Try plotting $$\cos^3x$$. You will see it yourself or you can prove it as well.

9. anonymous

Is this +2 's topic

10. anonymous

idk. but you it's pretty basic you can learn it even class 10th.

11. anonymous

you know* ...

12. anonymous

lol...not in 10 th....

13. anonymous

yes. you can. :-)

14. anonymous

thxxxx

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