Krishna
0

Step 1: Recall the \sin formula

FORMULA: If θ is one of the acute angles in a triangle, then the sine of

theta is the ratio of the opposite side(opp) to the hypotenuse(hyp).

=   \frac{opp}{hyp}

Step 2: Plug in the relevant side lengths.

EXAMPLE: From triangle EDC

Opposite side to angle D = EC

Hyp  = DC

\Rightarrow   \frac{EC}{DC}

\Rightarrow   \frac{72}{97}