Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Mathematics Complex Numbers Properties of Complex Numbers

If sin x + i cos 2x and cos x - i sin 2x are conjugate to each other, then:

1
x = nπ
2
x = (2n + 1)\(\frac{\pi}{4}\)
3
x = 1
4
No value of x 
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