If a ⃗+b ⃗+c ⃗ =0 ⃗, show that a ⃗×b ⃗ = b ⃗×c ⃗ = c ⃗×a ⃗. Also, interpret the result geometrically.
FIND Sin2A
The image of point (1,3,4) in the plane 2x-y+z+3
prove that tan^[ a-b/1+ab] +tan ^ [b-c/1+bc]+tan^c= tan^a