Mixed Trig

Mixed Trig

1. Does it have a right angle?

   • Yes - Are the angles needed to work out shown?
     • SoH CaH ToA
     • Pythagoras' Theorem
   • No - Do you know a matching pair?
     • Sine Rule - Finding an angle?
       • Yes - sinA/a = sinB/b = sinC/c
       • No - a/sinA = b/sinB = c/sinC
     • Cosine Rule - Finding an angle?
       • Yes - cosA = (b^2+c^2 - a^2)/2bc
       • a^2=b^2 +c^2-2bccosA