if 2x x 2x= 4x square then why not cos thita x cos thita = cos square thita square
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2x * 2x = 4x
Means
2*x*2*x
= 2*2*x*x
=4*x*x
But
Cos(theta)*cos(theta) is not same as
Cos * theta * Cos * theta
Thats why
Cos(theta) * Cos(theta) = Cos^2(theta)
Means
2*x*2*x
= 2*2*x*x
=4*x*x
But
Cos(theta)*cos(theta) is not same as
Cos * theta * Cos * theta
Thats why
Cos(theta) * Cos(theta) = Cos^2(theta)
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