Teaching UP TGT Mock Test Series 2025 Mathematics Trigonometry Trigonometric Functions

समीकरण cos x. cos ((π/3) + x). cos ((π/3) – x) = 1/4, x ∈ [0, 6π] के सभी हलों का योग है:

1
15π
2
30π
3
100π/3
4
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