2sinA+15cos^2A=7 , then the value of CotA
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Answer:
cotA=3/4 is the answer
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Answer:
cot alpha =३by४
Step-by-step explanation:
2sin alpha+15cos^2alpha=7,
2sin alpha+15(1-sin^2alpha)=7
15 sin^2 alpha -2 sin alpha -8=0
sin alpha= 4/5
cos alpha= 3/5
cot alpha = cos alpha/sin alpha= 3/4
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