Prove or disprove the statement. If a, b, and y are angles in the same triangle, then prove or disprove sin(a + B) If a + B + y = 180°, then a + ß = 180° sin(a + B) = sin 180° = sin(180°) cos(y) - cos(180°) = (0) cos(y) Hence, sin(a + B)? ✓ sin(y). sin(y) sin(y).

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