Question

41f sinA = 1/2, Find the value of 3cos30° - 4cos square
30°​

Answer 1

Step-by-step explanation:

3 cos 30° - 4 cos² 30°

=>

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

=>

$\frac{3 \sqrt{3} }{2} - \frac{12}{4}$

=>

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

=>

$\frac{3 \sqrt{3} - 6 }{2}$