Question

'If sin^2(5x - 30°) + cos^2 (2x + 15°) = 1, then x =
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Answer 1

Answer:

$\sin {}^{2} ( \alpha ) + \cos {}^{2} ( \alpha ) = 1$

5x-30 = 2x+15

5x-2x = 15+30

3x = 45

x = 15