SOLUTION: IF 2(cos^2 A - sin^2 A) = 1 A is a positive acute angle), then find the value of Cot A?

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Question 803176: IF 2(cos^2 A - sin^2 A) = 1
A is a positive acute angle), then find the value of Cot A?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
IF 2(cos^2 A - sin^2 A) = 1
A is a positive acute angle), then find the value of Cot A?
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2(cos^2 A - sin^2 A) = 1
(cos^2 A - sin^2 A) = 1/2
cos2A=1/2
2A=60˚
A=30˚
cotA=cot30˚=√3