GB-33-03-001 · Right-angle trigonometry

Diagram not accurately drawn

Find x. Give your answer to 1 decimal place.

SOH CAH TOA (Finding a Missing Length) Booklet p. 34

Method

1) Label triangle (H, O, A)

2) Circle what you have and what you want

3) Pick TOA triangle: O = tan(x) × A

Worked Example (GB-33-03-001)

1) Label sides

\mathbf{H}

(Hypotenuse),

\mathbf{O}

(Opposite angle),

\mathbf{A}

(Adjacent)

\tan 35^\circ=\frac{x}{19}

x=19\tan 35^\circ

4) 13.3 cm

13.3 cm