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4 sin (2x + 30) = -$\sqrt3$
sin (2x + 30) = $\frac{\sqrt3}{4}$
sin (2x + 30) = - $\frac{1.732}{4}$
sin (2x + 30) = -0.433
sin-1 -0.433 = 25.7o
The angle lies in the third and forth quadrant
2x + 30 = 180 + 25.7o
2x = 175.7; x = 87.9o
2x + 30 = 360 - 25.7
2x = 304.3; x = 152.2o
2x + 30 = -25.7
2x = -55.7; x = -27.8o
2x = -55.7; x = -27.8o
x = 87.9 and 152.2
johnmulu answered the question on March 7, 2017 at 09:18
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