Question

Sin100cos40-cos100sin40​

Answer 1

Sin(60°)=
`(√(3) )/(2)`

Step-by-step explanation:

Assuming the given angles are in degrees

We know that Sin(A-B)=SinACosB-CosASinB

Here A=100° and B=40°

`Sin(100)Cos(40)-Cos(100)Sin(40)=Sin(100-40)=Sin(60)=(√(3) )/(2)`