Question

How To calculate the range of cos square theta?? ​

Answer 1

For the range of cos²@:

* As we know that cos@ lies between -1 and 1 including both -1 and 1.

* -1≤cos@≤1 .....(i)

* Now for cos²@ we ll square (i)

Ps: squaring this way is not allowed , it will work here tho.

* we ll get 0≤cos²@≤1

Therefore range of cos²@ is between 0 and 1 including 0 and 1.

Answer 2

$\boxed{Explained\:Answer}$

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