Page 111 - CA_Blue( J )_Class10
P. 111
Answers
1. User Defined 2. Math.sqrt() 3. absolute 4. nearest 5. mn
6. 5 7. double 8. -53.0 9. 6.0 10. 4.0
C. Answer the following questions:
1. Write the output of the following statements:
a. System.out.println(Math.ceil(Math.pow(0.2,3)));
b. System.out.println(Math.max(Math.min (4.5,3.4),2.3));
Ans. a. 1.0 b. 3.4
2. If double a=2.3, b=4.5, then what will be the output of the following statements?
a. System.out.println(Math.pow(Math.ceil(a), 2));
b. System.out.println(Math.round(b) + Math.min(a,b));
Ans. a. 9.0 b. 7.3
3. What will the System.out.println(Math.abs(-3.4)); statement return?
Ans. 3.4
4. Write the output of the following program.
class output
{
public static void main()
{
int a=5;
double b=5.6, c;
System.out.println(a*Math.pow(a,2));
System.out.println(Math.ceil(b));
c=Math.min(a,b);
System.out.println(c);
}
}
Ans. 125.0
6.0
5.0
5. What will be the output of the following statements?
a. System.out.println(Math.rint(5.7)); b. System.out.println(Math.rint(-5.5));
c. System.out.println(Math.rint(5.5)); d. System.out.println(Math.rint(-2.8));
Ans. a. 6.0 b. -6.0
c. 6.0 d. -3.0
6. Write the output of the following statements.
a. System.out.println(Math.cbrt(15625)); b. System.out.println(Math.sqrt(81));
Ans. a. 25.0 b. 9.0
7. Write the final value that is stored in c and d.
double a= -10.2, b=-44.1,c,d;
c= Math.abs(Math.floor(a));
d=Math.ceil(Math.abs(b));
Ans. c = 11.0 d = 45.0
8. Convert the following mathematical expressions into Java expressions.
2
a. a + c 2 b. a 1⁄n
2
-b + b - 4ac
c. x = d. sin a cos b + cos a sin b where a and b are in radian
2a
109
Mathematical Library Methods 109

