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LAW OF SINE Sin A = Sin B = Sin C a b c A, B and C are angles. a, b and c are the sides opposite their angles. Use when: you have 2 angles and a side (AAS or ASA) you have 2 sides and an opposite angle (SSA)

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LAW OF COSINE a² = b²+ c² - 2bcCos A b² = a² + c² - 2acCos B c² = a² +b² - 2abCosC Use when: you have the measures of two sides and the included angle (SAS) you have 3 sides (SSS)

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Find angles from largest to smallest. To Find Angle Measure use 2 nd Trig function (Sin/Cos/Tan), 2 nd answer (or enter)

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