Using tables evaluate the following:cos^...

Using tables evaluate the following:`cos^2 0+cos^2 (pi/6)+cos^2 (pi/3)+cos^2 (pi/2)`

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Using tables evaluate the following:cos^2 0+cos^2 (pi/6)+cos^2 (pi/3)+...
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2sin^2(pi/6 )+c o s e c^2((7pi)/6)cos^2(pi/3)=3/2
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cos ^ (2) ((pi) / (8)) + cos ^ (2) ((3 pi) / (8)) + cos ^ (2) ((5 pi) ...
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The number of solutions of the equation cos^2(x+pi/6)+cos^2x-2cos(x+pi...
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sin ((pi) / (2 ^ (2009))) cos ((pi) / (2 ^ (2009))) cos ((pi) / (2 ^ (...
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cos ^ (2) (0) + cos ^ (2) ((pi) / (6)) + cos ^ (2) ((pi) / (3)) + cos ...
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(cos pi) / (5) + (cos (2 pi)) / (5) + (cos (6 pi)) / (5) + (cos (7 pi)...
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Evaluate the following: cos(2pi)/3cospi/4-sin(2pi)/3sinpi/4
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cos ^ (2) ((pi) / (3)) + cos ^ (2) ((2 pi) / (3)) + cos ^ (2) ((4 pi) ...
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