I need the answer to that problem too.
Since ∝ < β you can throw out answers C and D. Using the relationship of sine and cosine being complementary angles you can plug in the two smallest values. Out of those two for 13° you get sin18°=cos72° and 13°+72°=90°, meaning these two angles are complementary.
Answer:
x
=
151
21
Step-by-step explanation:
2x + 2x + 40 = 180
4x = 180
X = 180/4
X= 45
