if sinA = 1/2 then find the value of 3cos A - 4cos^3 A
Answers
Answered by
2
Step-by-step explanation:
SinA = 1/2 = Sin30°
A = 30°
3CosA - 4Cos³A
-(4Cos³A - 3CosA)
- Cos3A
- Cos(3*30°)
- Cos90°
= 0
Similar questions