The six trig ratios

The question
81517A tan A =

Write tan A as a fraction

How it works.

tan A=opposite / adjacent
tan A=
tan A=
  1. 01

    tan A is opposite over adjacent. Name the two sides you need, measured from angle A.

  2. 02

    Read them off the triangle: the opposite side of angle A is 8, the adjacent is 15.

  3. 03

    So tan A = 8/15.