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The six trig ratios, step by step

Sine, cosine and tangent each have a reciprocal.

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The question
81517A tan A =

tan A

Write tan A as a fraction

tan A=opposite / adjacent
tan A=8/15
tan A=8/15
  1. tan A is opposite over adjacent. Name the two sides you need, measured from angle A.
  2. Read them off the triangle: the opposite side of angle A is 8, the adjacent is 15.
  3. So tan A = 8/15.

How it works.

  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.

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