Question

what is sin150 value?????​

Answer 1

$\sin(180 - x) = \sin(x)$

$x = 150$

$\sin(180 - 150) = \sin(30)$

$\sin(30) = \frac{1}{2}$

Therefore sin(150) = 1/2

The reference angle for 150 is equal to 30. that reference angle is the angle within the triangle formed from dropping a perpendicular to the x-axis of the unit circle. here's a sketch of 30 degrees and 150 degrees on the unit circle and the triangles formed. the 30 degree angle is in quadrant 1.