74 A The problem refers to triangle ABC Find the area of the

7.4

A)

The problem refers to triangle ABC. Find the area of the triangle. Round to three significant digits A 41.50, B 72.10, a 190 in. in

Solution

Area of triangle=ab sinC/2

C=180-(A+B)=66.4

using sine law

sin 72.1/b=sin41.5/190

b=190sin72.1/sin41.5= 272.86 in

A=(190)(272.86)sin 66.4/2=23753.679 in^2