cos^(-1)[cos(-(17)/(15)pi)] is equal to ...

`cos^(-1)[cos(-(17)/(15)pi)]` is equal to -

cos^(-1)[cos(-(17)/(15)pi)] is equal to -
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Prove that: cos ((2 pi) / (15)) * cos ((4 pi) / (15)) * cos ((8 pi) / ...
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Prove that cos(2pi)/(15)cos(4pi)/(15)cos(8pi)/(15)cos(14pi)/(15)=1/(16...
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Show that 16cos((2pi)/(15))cos((4pi)/(15))cos((8pi)/(15))cos((16pi)/(1...
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(cos pi) / (15) (cos (2 pi)) / (15) (cos (3 pi)) / (15) (cos (4 pi)) /...
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cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)cos((5pi)/15)cos((6pi...
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The sum cos(pi/9)+cos((4pi)/9)+cos((3pi)/9)+......+cos((17pi)/9) equal...
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cos((pi)/(15))cos((2 pi)/(15))cos((pi)/(5))cos((4 pi)/(15))cos((2 pi)/...
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The sum cos ((pi) / (9)) + cos ((2 pi) / (9)) + cos ((3 pi) / (9)) + ....
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