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0.25881904510252074 = \frac{\pi}{6}
Evaluate trigonometric functions in the problem
0.25881904510252074\times 6=\pi
Multiply both sides by 6.
1.55291427061512444=\pi
Multiply 0.25881904510252074 and 6 to get 1.55291427061512444.
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Compare 1.55291427061512444 and \pi .
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