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If sinθ = 1/3, then cosθ will be (A) ±8/9 (B) ±4/3 (C) ±2√2/3

+2 votes

asked Dec 15, 2018 in Class 12 by kratos

If sinθ = 1/3, then cosθ will be

(A) ±8/9

(B) ±4/3

(C) ±2√2/3

(D) ±3/4

nda
trigonometry
class-11
class-10
class-12

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1 Answer

+1 vote

answered Feb 8, 2021 by kratos

Best answer

Correct option (C) ± 2√2/3

Explanation:

cosθ = √(1 - sin2θ) = (1 - 1/9) = ± 2√2/3

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