law of sine
DESCRIPTION
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). LAW OF COSINE. a² = b²+ c² - 2bcCos A - PowerPoint PPT PresentationTRANSCRIPT
LAW OF SINESin 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)
LAW OF COSINE
a² = b²+ c² - 2bcCos Ab² = a² + c² - 2acCos Bc² = a² +b² - 2abCosC Use when:you have the measures of two sides and the included angle (SAS)you have 3 sides (SSS)
Find angles from largest to smallest. To Find Angle Measureuse 2nd Trig function (Sin/Cos/Tan), 2nd answer (or enter)