Number 11, use law of sine
sin115/49=sinx/16
sinx=(sin115*16)/49)
sinx=0.3087
use your calculator: x is about 18 degree
question 12
two sides and the angle between them are given, use law of consine:
x²=14²+10²-2*14*10cos44
x is about 9.7
Answer:
136
Step-by-step explanation:
6*(4+2)+100
1rst the parenthesis
6*6+100
then the multiplication
36+100
and then the rest!
136
Three sides, because if you make a clean cut the surface of the cut is a triangle.
Answer:
89.8 feet
Step-by-step explanation:
In ΔBCD, the measure of ∠D=90°, the measure of ∠B=75°, and DB = 93 feet. Find the length of BC to the nearest tenth of a foot.
We would solve the above question using Sine rule
The formula is given as:
DB/sin D = BC/sin B
93/sin 90 = BC/sin 75
We cross multiply
sin 90 × BC = 93 × sin 75
BC = 93 × sin 75/sin 90
BC = 89.83 feet
Approximately BC = 89.8 feet