Help!!! A ship at sea is 70 miles from one radio transmitter and 130 miles from another.The measurement of the

Question

angle between signals is 130 degrees.How far apart are the transmitters?

b. an isosceles triangle has a base of 22cm and the vertex angle measuring 36degrees.compute its perimeter?

Answer 1

Part 1:

if distance between transmitters is d then

d^2 = 70^2 + 130^2 - 2*70*130*Cos(130)

from

a^2=b^2+c^2-2bc.Cos(A) - the cosine rule

Part 2:

The two unknown sides are equal. Call one side 'a'

Perimeter = 22 + 2.a

a = 11/Sin(18)

2a = 22/Sin(18)

Perimeter = 22 + 22/Sin(18)