It Cos 2A = Sin 40 degree then find the measure of angle A
Answers
Answered by
1
Step-by-step explanation:
cos2A = sin40°
cos2A = sin(90°–50°)
cos2A = cos50°
2A = 50°
A =25°
Answered by
1
Answer:
cos2A = sin40°
sin ( 90°- 2A) = sin (90°- 40°)
90°-90°-40° = 2A
40°/2=A
20° answer
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