Question

If sin A =1/2 find Cos 3A &Sin 3A​

Answer 1

Answer:

cos3A=0

sin3A=1

Step-by-step explanation:

we know sin30°=1//2

given sinA=1/2

thus A=30°

cos3A=cos 3(30°)=cos90°=0

sin3A=sin3(30°)=sin90°=1