11 grade maths others
State true or false: sin²A + cos²A = 1
State true or false: sin²A + cos²A = 1
1 Answer
Askiitians Tutor Team
The given statement is:
sin²A + cos²A = 1
This is a well-known trigonometric identity, called the Pythagorean identity. It is valid for any angle A.
Explanation:
The sine and cosine functions are related to the right triangle's sides in the unit circle.
The square of the sine of an angle plus the square of the cosine of that angle always equals 1.
Therefore, the statement is True.
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