solve the equation cos^2/cot^2-cos^2=3
JinKazama1:
Value of angle is 60° and -60° for pricipal angles
Is this correct?
solve the equation
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Final Answer : 60° if angle is acute.
For Calculation see pic
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I can't understand the third step
cot^2 (a) / cos^2(a) = sin^2(a)
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