Given: ΔABC. If ∠B = 35°, a = 4.5 cm, and b = 6.0 cm, what is the measurement of ∠A to the nearest tenth of a degree?
A) 21.5°
B) 23.2°
C) 25.5°
D) 30.7°
the law of sines established a/sin A=b/sin B--------sin A=[a*sin B]/b a=4.5 cm b=6 cm B=35° so sin A=[4.5*sin 35°]/6-----> sin A=0.43018 A=arc sin(0.43018)-------> A=25.5°
