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Mathematics
cos3 110° + cos310° + cos3 130° =
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Q. $\cos^{3} 110^{\circ} + \cos^{3}10^{\circ} + \cos^{3} 130^{\circ} = $
AP EAMCET
AP EAMCET 2018
A
$\frac{3}{4}$
24%
B
$\frac{3}{8}$
12%
C
$\frac{3 \sqrt{3}}{8}$
65%
D
$\frac{ 3 \sqrt{3}}{4}$
0%
Solution:
Correct answer is (c) $\frac{3 \sqrt{3}}{8}$