2670Ad Is coterminal with 2670Ad - 7(360a#39;) = 150V The reference angle is 30Ad. Since 2670Ad is in quadrant II, the cosine, tangent, cotangent, and secant are negative . sin 2670Ad = sin 30Ad = | cos 2670Ad = -cos 30 - = Ji tan 2670Ad = -tan 30Ad = cotanbsp;...

Title | : | Instructor's solutions manual, Trigonometry, sixth edition, Lial, Hornsby, Schneider |

Author | : | Margaret L. Lial, Sandra Morris |

Publisher | : | - 1997 |

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