Krishna
0

Step 1: Draw a special right triangle with a 60° angle.

    NOTE: A special right triangle 30\degree-60\degree-90\degree.                                    

                  It's sides are 1, 2 and \sqrt{3}

                  


Step 2: Calculate \sin60\degree

            NOTE:  The length of the opposite side is  \sqrt{3}

                                length of the hypotenuse is 1

                  \sin60\degree=\frac{opp}{hyp}=\frac{\sqrt{3}}{2}

                                 and

          

Step 3: Calculate \sin\ 30\degree  

                 The length of the opposite side is  1

                   length of the hypotenuse is 2

                    \sin30\degree=\ \frac{opp}{hyp}

                    \sin30\degree=\frac{1}{2}