Question

if cosx=√3/2 ,then 3sinx-4sin^3=??​

Answer 1

Step-by-step explanation:

cos 30° = $\frac{ \sqrt{3} }{2}$

hence x = 30°

now put this value in asked question

$3 \sin(x) - 4 { \sin(x) }^{3}$

$3 \sin(30) - 4 { \sin(30) }^{3}$

sin30° = 1/2

$3 \times \frac{1}{2} - 4 \times {(\frac{1}{2} )}^{3}$

$\frac{3}{2} - \frac{1}{2}$

$1$

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