If in `DeltaABC, angle A=90^(@)` and c, sin B cos B are rational numbers, then show a and b are rational .

If in DeltaABC, A =90^(@) and c, sin B and cos B are rational number, then

Find rational number between a and b .

If A&B are two ratinal numbers and AB,A+B and A-B are rational numbers, then A/B is: a.always rational b.never rational c.rational when B!=0 d.rational when A!=0

If A and B represent a rational number,then (A-B) is equal to

if (log)_a x=b for permissible values of a and x then identify the statements which can be correct. (a) If a and b are two irrational numbers then x can be rational (b) if a is rational and b is irrational, then x can be rational (c) if a is irrational and b is rational, then x can be rational (d) If a and b are two rational numbers then x can be rational .

If in a DeltaABC, angle B = (2pi)/(3) , then the cos A + cos C lies in

If A & B are two rational numbers and AB, A + B and A -B are rational numbers, then A/B is :

If in a DeltaABC , c = 3b and C - B = 90°, then tanB=