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Factorization Method Form to Remove Indeterminate Form

86. Prove tha...

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86. Prove that sin(2/7) + sin(4/7) + sin(8/7)=7/2

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Q. Prove that :

cos \frac{2 π}{7} + cos \frac{4 π}{7} + cos \frac{6 π}{7} = - \frac{1}{2}

prove that:

{(3 x + 7)}^{2} - {(3 x - 7)}^{2} = 84 x

Prove that:

sin(π/7)*sin(2π/7)*sin(3π/7)=(√7)/8

{log}_{7} {log}_{7} \sqrt{7 \sqrt{(7 \sqrt{7})}} = 1 - 3 {log}_{7} 2

cos \frac{2 π}{7} + cos \frac{4 π}{7} + cos \frac{6 π}{7}

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Factorization Method Form to Remove Indeterminate Form

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