Since the reference angle, 9a#39;, is the angle in the reference triangle, a negative measure does not have meaning (since the reference triangle refers to right triangle trigonometry), so we use the absolute value in finding 9a#39; we see that 9a#39;anbsp;...

Title | : | Students Solutions Manual to Algebra and Trigonometry |

Author | : | Demana |

Publisher | : | Philip Allan - 1990-01 |

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