Question

Sin^2a+cos^2a плиз ..........​

Answer 1

$sin^2a+cos^2a = 1$

это основное тригонометрическое тождество

Answer 2

The expression "sin^2(a) + cos^2(a)" represents a fundamental trigonometric identity known as the Pythagorean identity. In trigonometry, it states that for any angle "a" in a right-angled triangle, the square of the sine of that angle added to the square of the cosine of the same angle will always equal 1.

Mathematically, it can be written as:

sin^2(a) + cos^2(a) = 1

This identity is widely used in trigonometry and calculus when dealing with trigonometric functions and their relationships in various mathematical applications. It is a fundamental result that holds true for all angles "a" in trigonometry.