[ln Delta ABC," if "/_A=(pi)/(6),/_B=(pi)/(4)" and if "],[(AB)^(2)=K(BC)^(2)+(AC)^(2)," then "],[" value of "K^(2)" is "]

In a Delta ABC, if A=(4 pi)/(9) and B=(2 pi)/(9), then a^(2)-b^(2) is equal to

In Delta ABC,/_A=100^(@) and AB=AC. Find /_B and /_C

/_A=(pi)/(6) and b:c=2:sqrt(3), find /_B

In a /_ABC/_A=(pi)/(2) then cos^(2)B+cos^(2)C=

If int (sin 2x)/(sin (x-(pi)/(6)) sin (x+(pi)/(6)))dx= log | (k -2sin^(2) x)|+c , then the value of k is-

Draw a triangle ABC, with AC=4cm,BC=3cm and /_C=80^(@) . Measure AB. Is (AB)^(2)=(AC)^(2)+(BC)^(2)? If not,which one of the following is true: (AB)^(2)>(AC)^(2)+(BC)^(2) or (AB)^(2)<(AC)^(2)+(BC)^(2)?