how does 4sinA/2.sinB/2.cos(A+B)/2 = – ½ gives A=B=60 degrees ?
how does 4sinA/2.sinB/2.cos(A+B)/2 = – ½ gives A=B=60 degrees ?

Last Activity: 3 Years ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago