Q. 10 C3.8( 5 Votes )

# Prove that</p

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

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