If 2 sin^4 α+2 cos^4 α−1=0, where 0≤α<π/2, then what is sin 2α+cos 2α equal to?

Two dice each numbered from 1 to 6 are thrown together. Let A and B…

An urn contains one black ball and one green ball. A second urn contains one…

What is the most probable number of successes in 10 trials with probability of success…

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