M1
Section A · 1 mark · 66% correct
The question in our own words · page 9
A probability density function is \(k\sin x\) for \(0\le x\lt\frac{\pi}{4}\), \(k\cos x\) for \(\frac{\pi}{4}\le x\le\frac{\pi}{2}\), and \(0\) elsewhere, where \(k\) is a positive constant. What is \(k\)?
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