trigonometric ratio of multiple and sub multiple angles prove that questions | lecture 4

This lecture contains following questions on trigonometric ratio of multiple and submultiple angles Q) If sin A = 1/2, find sin 3A. Q) If sin A = 0.4, find sin 3A. Q) If sin A = 0.4, find the value of cos 2A. Q) If cos A = 0.4, find the value of cos 3A. Q) Find sinα, if tan(α/2) = 1/√3. Q) prove that 8 cos^3 (π/9) - 6cos(π/9) = 1. Q) If A = 30° verify the result sin 3A = 3sin A - 4sin^3 A. Q) If tanA = 1/2, tanB = 1/3 Find the value of tan (A + B). Q) prove that (cos 3A)/(cos A) + (sin 3A)/(sin A) = 4 cos 2A. Q) prove that (1 + sec2θ)/tan2θ = cotθ. trigonometric ratio of multiple and sub multiple angles problems sin of multiple angle formula based problems examples on sin of multiple angle formula Problems on sin of multiple angle formula cos of multiple angle formula based problems tangent of multiple angle formula based questions tangent of multiple angle formula based problems tangent of multiple angle formula based examples trigonometric ratio of multiple and sub multiple angles prove that questions Problems on trigonometric ratio of multiple angles formulas trigonometric ratio of multiple and sub multiple angles trigonometric ratio of multiple and sub multiple angles chapter trigonometric ratio of multiple and sub multiple angles diploma first semester trigonometric ratio of multiple and sub multiple angles first sem trigonometric ratio of multiple and sub multiple angles 1st sem