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| 1. |
If cos(π/7),cos(3π/7),cos(5π/7) are roots of the equation 8x^3-4x^2-4x+1=0 ,then cos(π/14) cos(3π/14) cos(5π/14) is |
| Answer» If cos(π/7),cos(3π/7),cos(5π/7) are roots of the equation 8x^3-4x^2-4x+1=0 ,then cos(π/14) cos(3π/14) cos(5π/14) is | |