other govt exam ISRO Assistant Mock Test 2022 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

If A = 60°, then what is the value of (4cos3 A - 3cos A)?

1
-1
2
\(- \frac{\sqrt 3}{2}\)
3
\(\frac{\sqrt 3}{2}\)
4
1
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