If it's an equation you usually have an unknown and an equal sign.
e.g. solve for x.
Hellom shayanbaig_3!
I'll take a guess as what you meant . . .
Note that 12° and 78° are complementary angles.Evaluate: .
That is, they are in the same right triangle.Code:* /| / | / | /12°| / |y / | / | / | / 78° | * - - - - * x
We see that: . . . . . They are equal !
Therefore: .