The values of the missing parts of the given triangle would be given below as follows:
For question 1.)
∠B = 48°
b = 6.1ft
a = -13.7 ft
How to calculate the missing values of the given triangle?
To calculate the missing values of the given triangle, the following steps should be taken as follows;
For question 1.)
Sin∅ = opposite/hypothenuse
∅ = 42°
opposite = a
hypothenuse = 15ft
Sin 42° = a/15
a = −0.91652154×15
= -13.7ft
c² = a² +b²
b = 15²-(-13.7)²
= 225 - 187.69
= 37.31
b = √37.31
= 6.1ft
∠B = 180-(42+90)
= 180- 132
= 48°