If Sin θ = 20/29, then what is the value of Cos θ?
Given : $$sin\theta=\frac{20}{29}$$
Using, $$sin^2\theta+cos^2\theta=1$$
=> $$cos^2\theta=1-(\frac{20}{29})^2$$
=> $$cos^2\theta=1-\frac{400}{841}=\frac{441}{841}$$
=> $$cos\theta=\sqrt{\frac{441}{841}}=\frac{21}{29}$$
=> Ans - (B)
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