Question

What's cosine^2(x)+sin^2(x)​

Answer 1

The expression
`\displaystyle\sf \cos^(2)(x)+\sin^(2)(x)` represents the fundamental trigonometric identity known as the Pythagorean identity. It states that the square of the cosine of an angle plus the square of the sine of the same angle is always equal to 1.

Therefore,
`\displaystyle\sf \cos^(2)(x)+\sin^(2)(x)=1`.

This identity holds true for any value of
`\displaystyle\sf x`.