4sin2 x - 3 = 0, find x if 0 \(\geq\) x \(\geq\) 90o
A
30o
B
45o
C
60o
D
9o
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
4 sin2x - 3 = 0
sin2x = \(\frac{3}{4}\)
Sin x = \(\pm\) \(\sqrt{\frac{3}{4}}\)
= \(\pm\) \(\sqrt{\frac{3}{4}}\)
= 60o
Source: Myschool Past Questions Archive (Record #31600)