Answer:
C. x=22°
Step-by-step explanation:
Since the principles of sine and cosine are based upon right triangles, the two angles have to be complementary, adding up to 90. Thereby, in your equation, (x+2) + (3x) = 90. Combining like terms gives you:
4x + 2 = 90 subtract 2 from both sides
- 2 -2
4x = 88 divide both sides by 4
4 4
x = 22
