SSC CGL 2024 PYQ — Question 68

SSC CGL - 25 Sep 2024 - Shift 3 • Quantitative Aptitude • Q68

Find the value of 3sin15˚ - 4sin³15˚.

Show answer & explanation

Correct answer: C

Explanation

The correct answer is option 3 i.e. $1\over\sqrt{2}$ .

3sin15˚ - 4sin³15˚

sin(3θ) = 3sinθ - 4sin³θ

sin(3 × 15°) = sin 45° = $\frac{1}{\sqrt2}$