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The expression $(cos^6\theta + sin^6\theta - 1) (tan^2\theta +cot^2\theta +2) +3 $ is equal to : |
0 1 2 -1 |
0 |
( cos6θ + sin6θ - 1 ) ( tan2θ + cot2θ + 2 ) + 3 Put θ = 45º = ( \(\frac{1}{8}\) + \(\frac{1}{8}\) - 1 ) ( 1 + 1 + 2 ) + 3 = - \(\frac{3}{4}\) × 4 + 3 = 0 |
