`tan 5^@` is (A) rational number (B) Irrational number (C) prime number (D) none of these

(log)_4 18 is a rational number (b) an irrational number (c)a prime number (d) none of these

The product of any natural number and the smallest prime is (a)an even number (b) an odd number a prime number (d) None of these

The 10th term of (3-sqrt((17)/4+3sqrt(2)))^(20) is (a) a irrational number (b) a rational number (c) a positive integer (d) a negative integer

If tantheta=sqrt n , where n in N, >= 2 , then sec2theta is always (a) a rational number (b) an irrational number (c) a positive integer (d) a negative integer

The number (log)_2 7 is (1990, 2M) (a) an integer (b) a rational number (c) an irrational number (d) a prime number

The number (log)_2 7 is (1990, 2M) ,a) an integer (b) a rational number ,c) an irrational number (d) a prime number

Find whether the following statements are true or false. (i) Every real number is either rational or irrational. (ii) pi is an irrational number. (iii) Irrational numbers cannot be represented by points on the number line.

The solution of the equation 7^(logx)-5^(logx+1)=3*5^(logx-1)-13*7 ^(logx-1)is (a) an even number (b) rational number (c) irrational number (d) composite number

All the rational numbers are irrational also.

If f(x)=cosx+cosa x is periodic function, then a must be (a)an integer (b) a rational number (c)an irrational number (d) an even number