#### The value of  is Option 1) Option 2) Option 3) Option 4)

As we learnt in

Results from Compound Angles -

- wherein

These results can be obtained by compound angle formula i.e. sum and difference formulae.

Option 1)

This option is incorrect

Option 2)

This option is incorrect

Option 3)

This option is correct

Option 4)

This option is incorrect