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}