" 39.(i) "sin3A=3sin A-4sin^(3)A

If A=30, then show that sin3A=3sinA-4sin^(3)A

If A=30^(@) , then prove that : sin3A=3sinA-4sin^(3)A

If A=30, then show that sin3A=3sinA-4sin^(3)A

if 2 sin A - 1 = 0, show that : sin 3 A = 3 sin A - 4 sin^(3) A

Prove that sin3A=3sinA-4sin^3 A

If A= 30^@ verify that :- sin3A=3sinA- 4sin^3 A .

sin4A=4cos^(3)A sin A-4sin^(3)A cos A

If 2sinA-1 = 0 then show that sin3A = 3 sinA -4sin^3A .

Prove that : sin3x=3sinx-4sin^(3)x

Taking theta=30^(@) , verify each of the following (i) sin 3theta=3sin theta -4sin^(3) theta (ii) cos3 theta=4cos^(3)theta-3cos theta