IN a `DeltaABC,` let `a=6,b=3and cos (A-B)=4/5.`
All symbols used have usual meaning in a triangle.
Statement I `angle B =(pi)/(2)`
Statement II `sin A =(2)/(sqrt5)`

In a DeltaABC, if a=13, b=14and c=15, then angle A is equal to (All symbols used have their usual meaning in a triangle.)

In DeltaABC, if 2b =a+ c and A-C=90^(@), then sin B equal All symbols used have usual meaning in Delta ABC.]

In a triangle ABC, a^3 + b^3 + c^3 = c^2 (a + b + c) (All symbol used have usual meaning in a triangle.) Statement-1: The value of /_C=60^@ . Statement-2: Delta ABC must be equilateral.

Let a = 6, b = 3 and cos (A -B) = (4)/(5) Value of sin A is equal to

In Delta ABC , the ratio a/sin A=b/sinB=c/sinC is not always equal to (All symbols used have usual meaning in a triangle.) a. 2R, where R is the circumradius b. (abc)/(2Delta), where Delta is the area of the triangle c. 2/3 (a^(2)+ b^(2) +c^(2)) ^(1/2) d. ((abc)^(2/3))/((h_(1)h_(2) h_(3))^(1/3)

In a DeltaABC , if b =(sqrt3-1) a and angle C=30^(@), then the value of (A-B) is equal to (All symbols used have usual meaning in the triangel.)

In an acute angle Delta ABC, let AD, BE and CF be the perpendicular from A, B and C upon the opposite sides of the triangle. (All symbols used have usual meaning in a tiangle.) The orthocentre of the Delta ABC, is the

In a triangle ABC, if angle A = 30^@, b = 10 and a = x, then the values of x for which there are 2 possible triangles is given by(All symbols used have usual meaning in a triangle.) (a) 5 lt x lt 10 " " (b) x lt 5/2 " " (c) 5/3 lt x lt 10 " " (d) 5/2 lt x lt 10

In an acute angle Delta ABC, let AD, BE and CF be the perpendicular from A, B and C upon the opposite sides of the triangle. (All symbols used have usual meaning in a tiangle.) The circum-radius of the Delta DEF can be equal to

In AABC, angle A, B and C are in the ratio 1:2:3, then which of the following is (are) correct? (All symbol used have usual meaning in a triangle.)