A chord 12 cm long is drawn in a circle of diameter 20 cm. The distance of the chord from the centre is
1). 8 cm
2). 6 cm
3). 10 cm
4). 16 cm
1. The measure of the angle between the internal and external bisectors of an angle is
2. If x+$\frac{1}{x}$=5, then the value of $\frac{x}{1+x+x^{2}}$
3. If x + (1/x) = (√3 + 1)/2, then what is the value of x2 + (1/x2)?
4. If √(1 +$\cot^{2}$A)= x, then the value of x is
5. x3 + y3 = 35 and x + y = 5, then the value of (1/x + 1/y) is
6. If x = 1 - y and $x^{2} = 2 - y^{2},$ then what is the value of xy?
9. Let ABC be an equilateral triangle and AD perpendicular to BC. Then $AB^{2}+BC^{2}+CA^{2}$ =