alleryএটা সূক্ষ্মকোণৰ sine হৈছে 5/13। ইয়াৰ cosine নিৰ্ণয় কৰক।
A5/12
B8/13
C13/12
D12/13
Answer & Solution
Correct answer: D. 12/13
Cos θ হৈছে 1 - 25/169 = 144/169 ৰ বৰ্গমূল, যিটো হৈছে 12/13।
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