State the maximum and minimum values of:

MATHEMATICS · Multi-part · A Level · Mathematics · Trigonometry · Trigonometry

Problem

State the maximum and minimum values of: (1) y=4cos⁡2xy=4\cos2x (2) y=3cos⁡x+5y=3\cos x+5 (3) y=−2cos⁡(x−3)−4y=-2\cos(x-3)-4

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