trigono

Asked by poojathally | 18th Feb, 2010, 02:35: PM

Expert Answer:

cos A = 3/5.

Construct a right angle triangle with one side 3 and hypotenuse 5 units, and you'll identify the other side as 4 units.

Hence sin A = 4/5.

Did you mean cot2A or cot2A?

Considering you meant cot2A.

16cot2A - 1 = 16x(3/5)2/(4/5)2 - 1 = 8

Regards,

Team,

TopperLearning.

Answered by  | 18th Feb, 2010, 02:41: PM

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