Please help me with this one too! =)

Question

Given triangle ABC with a = 7, C = 37°, and B = 18°, find c. Round the answer to two decimal places.

a. 13.63

b. 5.14

c. 18.56

d. 3.59

Given triangle ABC with b = 2, c = 4, and measure of angle A= 118 degrees, find a. Round the answer to two decimal places.

a. 4.87

b. 3.53

c. 3.26

d. 5.25

Answer 1

1) Given that 

In a triangle sum of the angles is 180

A + B + C = 180

A + 18 + 37 = 180

A + 55 = 180

A = 180 - 55

Apply sine rule

5.136 = c

Therefore c = 5.14

Answer is option ( b )

2) Given that

Apply cosine rule

a = 5.244

Therefore  a = 5.25

Answer is option ( d )