Question

Please help I don't know if it's sin, cosin or tan

Answer 1

Apply the trigonometric function:

Sin a = opposite side / hypotenuse

Where:

a = angle = 50°

opposite side = x

Hypotenuse = 1.8

Replacing:

Sin 50° = x / 1.8

Solve for x

Sin 50° * 1.8 = x

x = 1.4