Question

Is cos square 90 equal to 0
?
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Answer 1

Let me explain u....

So cos 90 = 0

Pretty simple right?

Now, u just need to square it, what is square of 0?

Obviously, its 0.

So cos square 90 = 0

Answer 2

ya cos square 90 is equal to 0

bcz as the angle in a right triangle increase, cosine value of that Angel decrease