A.
B.
C.
D.
Step 1: sin B =
1213, 90° <
∠B < 180°

Step 2: tan B = -
125[Tangent is negative in quadrant II.]
Step 3: tan 2B =
2(- 125)1 -( -125)2[Use Double Angle formula tan 2B =
2tan B1 - tan2B.]
Step 4: =
- 2451 - 14425 =
- 245 ×
25- 119 =
120119