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16(costheta-cos(pi/8))(costheta-cos((3pi...

`16(costheta-cos(pi/8))(costheta-cos((3pi)/8))(costheta-cos((5pi)/8))``(costheta-cos((7pi)/8))= lambdacos4theta,` then the value of `lambda` is _____.

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16(costheta-cospi/8)(costheta-cos(3pi)/8)(costheta-cos(5pi)/8)(costheta-cos(7pi)/8)=lambdacos4theta, then the value of lambda is _____.

Let f( theta) = ( cos theta - "cos" (pi)/(8))(cos theta - "cos" (3 pi)/(8))(cos theta - "cos" (5 pi)/(8) )(cos theta - "cos" (7pi)/(8)) then :

cos^4(pi/8)+cos^4((3pi)/8)+cos^4((5pi)/8)+cos^4((7pi)/8)=

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Show that 16cos((2pi)/(15))cos((4pi)/(15))cos((8pi)/(15))cos((16pi)/(15))=1

If x\ costheta=y cos(theta+(2pi)/3)=z cos(theta+(4pi)/3) , then write the value of 1/x+1/y+1/zdot

cos(pi/65)cos((2pi)/65)cos((4pi)/65)cos((8pi)/65)cos((16pi)/65)cos((32pi)/64)=1/64

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