A) If A = 60, B = 30°, then prove thatSin²A - sin² B 8cos? A cos²Bb) IfAz 60°,...

August 2021 0 6 Report

A) If A = 60, B = 30°, then prove that
Sin²A - sin² B 8
cos? A cos²B
b) If
Az 60°, B = 450, then
prove that
tan A-tan B = 2-5.
It tan A tanB