Answer:
45
Step-by-step explanation:
Answer:
<u>A.</u><u> </u><u>138°</u>
Step-by-step explanation:
hope it helps u...
Cos²(x) + sin²(x)
¹/₂[1 - cos(2x)] + ¹/₂[1 + cos(2x)]
[¹/₂ - ¹/₂cos(2x)] + [¹/₂ + ¹/₂cos(2x)]
¹/₂ + ¹/₂ - ¹/₂cos(2x) + ¹/₂cos(2x)
1
Answer: 60°
Step-by-step explanation: 180 - 120 = 60.