Prove that
To prove:
Taking LHS,
Putting π = 180°
= 4 sin 30° sin2 60° + 3 cos 60° tan 45° + cosec2 90°
Now, we know that,
tan 45° = 1
cosec 90° = 1
Putting the values, we get
= 4
= RHS
∴ LHS = RHS
Hence Proved