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प्रश्न
Choose the correct alternative:
If cos pθ + cos qθ = 0 and if p ≠ q, then θ is equal to (n is any integer)
पर्याय
`(pi(3"n" + 1))/("p" - "q")`
`(pi(2"n" + 1))/("p" +- "q")`
`(pi("n" +- 1))/("p" +- "q")`
`(pi("n" + 2))/("p" + "q")`
उत्तर
`(pi(2"n" + 1))/("p" +- "q"`
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