MATH SOLVE

3 months ago

Q:
# The law of cosines is used to find the value of m.

Accepted Solution

A:

sin(28) = m/27

or

m = 27 x (sin(28))

That's the easy way to find it, but if they want you to use cos, that is really tricky. They give you everything that cos would show.

you could just show a^2 + b^2 = c^2

(18)^2 + b^2 = (27)^2

324 + b^2 = 729

b^2 = 405

b = square root of 405

b = 20.1246117975

or

m = 27 x (sin(28))

That's the easy way to find it, but if they want you to use cos, that is really tricky. They give you everything that cos would show.

you could just show a^2 + b^2 = c^2

(18)^2 + b^2 = (27)^2

324 + b^2 = 729

b^2 = 405

b = square root of 405

b = 20.1246117975