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CUET
General Test
Quantitative Reasoning
Trigonometry
If cos θ cosec 27° = 1; the value of θ is?
63°
27°
67°
65°
cos θ cosec 27° = 1
⇒ cos θ.\(\frac{1}{sin 27°}\) = 1
⇒ cos θ = sin 27° ( because cos θ = sin (90-θ))
⇒ 27 = 90 - θ or θ = 63°