Question

If 2cos a =route 3, prove 3sin a - 4sin³a=1

Answer 1

Answer:

cos × sin

Step-by-step explanation:

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Answer 2

2cosA = √3

=> cosA = √3/2

=> cosA = cos(30°)

=> A = 30°

Now,

3 sinA - 4 sin^3(A) = 3 sin(30°) - 4 sin^3(30°)

= 3(1/2) - 4(1/2)^3

= 3/2 - 1/2

= 2/2

= 1

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