" (ii) "cos^(-1)(cos(13 pi)/(6))...

" (ii) "cos^(-1)(cos(13 pi)/(6))

" (ii) "cos^(-1)(cos(13 pi)/(6))
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Find the value of the following: cos^(-1)(cos((13pi)/6))
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cos^(-1) (cos(13pi)/6)
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2cos(pi/13)cos(9pi/13)+cos(3pi/13)+cos(5pi/13)=0
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(sin ((pi) / (10)) + sin ((13 pi) / (10))) ((cos ^ (2) ((pi) / (6)) - ...
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(sin((pi)/(10))+sin(13(pi)/(10)))(cos^(2)((pi)/(6))-cos^(2)((pi)/(10))...
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The expression (cos(10 pi))/(13)+(cos(8 pi))/(13)+(cos(3 pi))/(13)+(co...
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The value of (1+cos (pi/6))(1+cos(pi/3))(1+cos ((2pi)/3))(1+cos((7pi...
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Prove that: sin(8pi)/3cos(23pi)/6+cos(13pi)/3sin(35pi)/6=1/2
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