Question

Given: a = 640, A = 70°, B = 52° in triangle ABC ; find c . Round answers to the nearest whole number. Do not use a decimal point or extra spaces in the answer or it will be marked incorrect.

Answer 1

Side a = 640

Side b = 536.69346

Side c = 577.58332

Explanation:

Answer 2

Law of sines:

`(a)/(\sin A)=(b)/(\sin B)=(c)/(\sin C)\\=(640)/(\sin 70)=(c)/(\sin (180-70-52))\\\text{ then}\\c=(640)/(\sin 70)\sin (180-70-52)\\=577`