Question

Спростити вираз 1-cos^2a

Answer 1

1-cos²a=sin²a
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Answer 2

$1- cos^{2} \alpha = sin^{2} \alpha$

Answer 3

1-cos^2a can be simplified using the trigonometric identity 1-cos^2a = sin^2a. This identity comes from the Pythagorean identity which states that sin^2a + cos^2a = 1.

So, 1-cos^2a = sin^2a. This means that when you subtract the square of the cosine of an angle from 1, you get the square of the sine of the same angle.