alleryએક લઘુકોણનો સાઈન (sine) 5/13 છે. તેનો કોસાઈન (cosine) શોધો.
A5/12
B8/13
C13/12
D12/13
Answer & Solution
Correct answer: D. 12/13
Cos θ એ 1 - 25/169 = 144/169 નું વર્ગમૂળ છે, જે 12/13 થાય છે.
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