यदि `A = 30^(@) , ` तो दिखाइए कि ` cos 3A = 4 cos^(3) A - 3 cos A`

Prove that cos3A=4cos^3 A-3cosA

Prove : cos3x=4cos^(3)x-3cosx

If 4 cos^(2) A - 3 = 0, show that : cos 3 A = 4 cos^(3) A - 3 cos A

If A=30^(@) , then prove that : " "cos3A=4cos^(3)A-3cosA

Prove that: cos3x=4cos^(3)x-3cosx

If A= 30^@ verify that :- cos3A=4 cos^3 A -3cosA .

If A=30^(@) verify that cos3A=4cos^(3)A-3cos A

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

If A = 30^(@) , show that : (i) (1 + sin 2A + cos 2A)/(sin A + cos A) = 2 cos A (ii) (cos^(3)A - cos 3A)/(cos A) + (sin^(3)A + sin 3A)/(sin A) = 3