Question

List all trigonometric identities used in class 11.​

Answer 1

Basic Trigonometric Formulas for Class 11

• cos (A + B) = cos A cos B – sin A sin B.
• cos (A – B) = cos A cos B + sin A sin B.
• sin (A+B) = sin A cos B + cos A sin B.
• sin (A -B) = sin A cos B – cos A sin B.