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Question
Cos 60degree-tan square 45degree+3/4 tan square 30 degree+ cos square 30 degree - sin 30 degree
Cos 60degree-tan square 45degree+3/4 tan square 30 degree+ cos square 30 degree - sin 30 degree
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Solution
cos60 - tan^2(45) + 3/4 tan^2(30) + cos^2(30) - sin30
= 1/2 - (1)^2 + 3/4*(1/√3)^2 + (√3/2)^2 - 1/2
= 1/2 - 1 + 1/4 + 3/4 - 1/2
= 0
= 1/2 - (1)^2 + 3/4*(1/√3)^2 + (√3/2)^2 - 1/2
= 1/2 - 1 + 1/4 + 3/4 - 1/2
= 0
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