Question

Find the value of :-

4Cos³ 30° - 3Cos 30°

Irrelevant, short and copied answer will be reported.
(Answer only if you know)​

Answer 1

cos30°=√3/2

4cos^3 30°-3 cos 30

4 x (√3/2)^3 - 3 x √3/2

4 x 3√3/8 - 3√3/2

12√3/8 - 3√3/2

Take the L.C.M

12√3-12√3 /3

=0

Answer 2

Step-by-step explanation:

Answer:

.....................

$\sf{(4cos³30-3cos30)}$

$\sf\red{As. we. know. that ,,cos3\theta=4cos³theta-3costheta}$

$\small\sf\pink{4cos³30-3cos30=3cos30}$

$=\dfrac{3sqrt{3}}{2}$

☞$\dfrac{3sqrt{3}}{2}$