sin A= (12/13) হলে tan A এর মান কত?
Solution
Correct Answer: Option B
দেয়া আছে, sin A= (12/13)
আমরা জানি, sin²A + cos²A = 1
তাহলে,
cos²A = 1 − sin²A = 1 − (12/13)² = 1 − 144/169 = 25/169
তাহলে,
cos A = 5/13
এখন,
tan A = sin A / cos A = (12/13) ÷ (5/13) = 12/5
উত্তর: 12/5
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