If a-b+2ai=3+6i, then find a and b.

If a-5b+3ai=7-3i, then find a and b.

If 7a-b+5ai=7+5i, then find a and b.

If 2b+(a-b)i=2+3i, then find a and b. .

If a+(b+2a)i=1-4i, then find a and b.

If (a+b)-i(3a+2b)=5+2i , then find a a n d bdot

If sin^(-1)(a-a^2/3+a^3/9-...)+cos^(-1)(1+b+b^2+...)=pi/2 then find a and b

If A={1,2,3,4} and B={1,2,3,5,6}, then find A cap B and B cap A. Are they equal.

If A={1,2,3,4,5} and B={4,5,6,7}, then find A-B and B-A. Are they equal?

If vec | a| = sqrt(3) , |vec(b)| = 2 and vec(a) . vec(b) = sqrt(6) , then find angle between the vectors vec(a) and vec(b)

If A : B = 2 : 3 , B : C = 4 : 5 " and " C : D = 6 : 7 , then find A : D .