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1 Unit 1: Pure Mathematics A

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Question 150
a.

Show that the equation 3sin⁡2xtan⁡2x=cos⁡2x+23\sin 2x \tan 2x = \cos 2x + 23sin2xtan2x=cos2x+2 can be written in the form 4cos⁡22x+2cos⁡2x−3=04\cos^2 2x + 2\cos 2x - 3 = 04cos22x+2cos2x−3=0

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b.

Find all the values of x x\,x in the interval 0°⩽x<180° 0° \leqslant x < 180°\,0°⩽x<180° for which 3sin⁡2xtan⁡2x=cos⁡2x+23\sin 2x \tan 2x = \cos 2x + 23sin2xtan2x=cos2x+2 Give your answers to 2 decimal places.

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1 Unit 1: Pure Mathematics A Questions

  1. A Level
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