For a real angle \(\theta,\) the expression \(k=5\sin\theta-12\cos\theta\) is given. What is the maximum possible value of \(k\)?
1. \(12\)
2. \(5\)
3. \(13\)
4. \(17\)
Subtopic:  Trigonometry |
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Level 1: 80%+
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