defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Trigonometry Trigonometric Functions
The equation 3sin2x + 10 cos x – 6 = 0 is satisfied if (n ∈ I)
1
x = nπ + cos–1(1/3)
2
x = nπ – cos–1(1/3)
3
x = 2nπ ± cos–1(1/3)
4
x = \(\frac{nπ}{2}\) - cos–1(1/3)