यदि 9cosA + 12sinA = 15 है, तो cotA का मान ज्ञात कीजिए। A. 3/4 B. 12/13 C. 1/3 D. 3/5

9 cos A + 12 sin A = 15 means 3 cos A + 4 sin A = 5, the maximum value, reached when cos A = 3/5 and sin A = 4/5. So cot A = 3/4.