SSC IB ACIO Grade II Mock Test 2023 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If θ is an acute angle and sin θ cos θ = 2cos3θ - 1.5 cos θ, then what is sin θ equal to ?
1
\(\frac{\sqrt 5 -1}{4}\)
2
\(\frac{1-\sqrt 5}{4}\)
3
\(\frac{\sqrt 5+1}{4}\)
4
\(-\frac{\sqrt 5 +1}{4}\)