All sample classesUNIT–II · TRIGONOMETRY
Unit II · Trigonometry Proofs
A free MathsAid sample class. Press Teach automatically and the teacher explains each step in Malayalam while the proof is written on the board. Use the question buttons below the board to switch between the three problems.
Triple-angle identitiesProduct of sinesTriangle identitiesMalayalam narration
UNIT II · V. (a) · TRIGONOMETRIC IDENTITYQUESTION 1 OF 3
Prove that (sin 3A / sin A) + (cos 3A / cos A) = 4 cos 2A
Prove the identity step by step, writing every substitution clearly.
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