Krishna
0

Step 1: Recall the trigonometric ratios of some specific angles.

            

              

Step 2: Substitute the values of the trigonometric ratios in the given equation

              EXAMPLE:   \sin 45\degree + \cos 45\degree

                                =   \frac{1}{\sqrt{2}} + \frac{1}{\sqrt{2}} (since table in step 1)

                                = \frac{2}{\sqrt{2}}

                                = \sqrt{2}