Mathematics - Online Test
Q1. If then cot B + cot C - cot A =
Answer : Option C
Explaination / Solution:
Q2. If f (x)
= x / x+1 , then its differential is
given by
Answer : Option B
Explaination / Solution:
Q3. 
Answer : Option C
Explaination / Solution:
Q4. The area of the region between the curve y = 4 – and the x –axis is equal to
Answer : Option B
Explaination / Solution:
y = And
Required area:
= = =
Required area:
= = =
Q5. The equation xy = 0 in three dimensional space represents
Answer : Option B
Explaination / Solution:
since xy=0 implies x=0 or y=0.i.e YZ plane or XZ plane.Hence it represents a pair of planes at right angles
Q6. A square matrix A is called idempotent if
Answer : Option C
Explaination / Solution:
If the product of any square matrix with itself is the matrix itself , then the matrix is called Idempotent.
Q7. ∫ 23 x+5 dx is
Answer : Option D
Explaination / Solution:
Q8. If | z1 |
= 1, | z2 | = 2, | z3 | = 3 and | 9z1 z2
+ 4z1 z3 + z2 z3 | = 12 , then the value of | z1 + z2 + z3 | is
Answer : Option B
Explaination / Solution:
Q9. If 
= 90 then n is
= 90 then n is
Answer : Option D
Explaination / Solution:
Q10. The number of ways in which a host lady invite 8 people for a party of 8 out of 12 people of whom two do not want to attend the party together is
Answer : Option C
Explaination / Solution:
