Trigonometric Equation Values (Jee Mains) | ExamDuo
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Basic Ratios, Identities & Formulas
Medium
Trigonometric Equation Values
If 5 cos 2θ + 2 cos²
θ
2
+ 1 = 0, when (0 < θ < π), then the value of θ are
SELECT ONE OPTION
A
π
3
+ π
B
π
3
, cos⁻¹
(
3
5
)
C
cos⁻¹
(
3
5
)
± π
D
π
3
, π - cos⁻¹
(
3
5
)
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