question_answer

The value of \[\text{4co}{{\text{s}}^{\text{2}}}\text{6}0{}^\circ +\text{4ta}{{\text{n}}^{\text{2}}}\text{45}{}^\circ -\text{cose}{{\text{c}}^{\text{2}}}\text{3}0{}^\circ \] is

A)  0           

B)                         2

C)  1                              

D)         \[\frac{1}{2}\]