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ഒരു നിശിതകോണിന് 5/13 സൈൻ ഉണ്ട്. അതിന്റെ കോസൈൻ കണ്ടെത്തുക.

A5/12
B8/13
C13/12
D12/13
Answer & Solution
Correct answer: D. 12/13
കോസ് θ എന്നത് 1 - 25/169 = 144/169 എന്നതിന്റെ വർഗ്ഗമൂലമാണ്, അതായത് 12/13.
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