Question

How do you solve `\cos (80^@) = x/10`?

Answer 1

`x` is about `1.73648`.

Explanation:

Isolate `x` and then use a calculator to compute the trig function:

`color(white)=>cos(80^@)=x/10`

`color(white)=>10*cos(80^@)=x`

`=>10*0.173648~~x`

`color(white)=>1.73648~~x`