Question

Solve the question below, please..

Answer 1

C = 133.33°

Explanation:

Apply the Law of Cosines to find angle C:

`Cos(C) = (a^2 + b^2 - c^2)/(2ab)`

Where,

a = 8.5 cm

b = 4.1 cm

c = 11.7 cm

Plug in the values

`Cos(C) = (8.5^2 + 4.1^2 - 11.7^2)/(2*8.5*4.1)`

`Cos(C) = (-47.83)/(69.7)`

`Cos(C) = -0.6862`

`C = Cos^(-1)(-0.6862)`

C = 133.33°