Trigonometry - mecmath

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2 Chapter 1 • Right Triangle Trigonometry §1.1 (a) Two acute angles are complementary if their sum equals 90 .In other words, if 0 ≤ ∠ A,∠B≤90 then ∠A and ∠ Bare complementary if ∠ +∠ =90 . (b) Two angles between 0 and 180 are supplementary if their sum equals 180 .In other words, if 0 ≤∠ A,∠B≤180 then ∠ and ∠B are supplementary if ∠A+∠B=180 .

  Chapter, Chapter 2, Trigonometry