sin A - 2 sin^3 A/
2 cos^3 A - cos A = tan A
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Answered by
2
Step-by-step explanation:
SinA(1 - 2Sin²A)/CosA(2Cos²A - 1)
SinA*Cos2A/CosA*Cos2A
SinA/CosA = tanA
Answered by
2
Answer:
sin a -2sin ^3 a/ 2cos^3 a + cos a
=sin a (1-2sin^2a)/ cos a ( 2cos2a+1)
=sin a/cos a × 1-2sin2a/2cos2a+1
=tan a × 2(1-sin2a)/2(1-sin2 a)+1
=tana ×1/1
=tan a=RHS
it will help you...i m a teacher and the answer is correct
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