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ଏକ ସୂକ୍ଷ୍ମକୋଣର sine 5/13 ଅଟେ। ଏହାର cosine ନିର୍ଣ୍ଣୟ କରନ୍ତୁ।

A5/12

B8/13

C13/12

D12/13

Answer & Solution

Correct answer: D. 12/13

Cos θ ହେଉଛି 1 - 25/169 = 144/169 ର ବର୍ଗମୂଳ, ଯାହା 12/13 ଅଟେ।

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