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If Cot θ = 21/20, then what is the value of Cosec θ?
- A21/29
- B29/21
- C20/29
- D29/20
Answer not set
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CCommunity
Using trigonometric identities,
cosec2 θ = 1 + cot2 θ
⇒ cosec2 θ = 1 + (21/20)2 = 1 + 441/400 = 841/400
∴ cosec θ = √(841/400) = 29/20
cosec2 θ = 1 + cot2 θ
⇒ cosec2 θ = 1 + (21/20)2 = 1 + 441/400 = 841/400
∴ cosec θ = √(841/400) = 29/20