This is a well-known trigonometric identity. The sum of the squares of sine and cosine of an angle, plus the square of the cotangent of that angle, will always be equal to 1. This identity can be derived using the Pythagorean identity for sine and cosine.
=1
This is a well-known trigonometric identity. The sum of the squares of sine and cosine of an angle, plus the square of the cotangent of that angle, will always be equal to 1. This identity can be derived using the Pythagorean identity for sine and cosine.