NAT IIP Physical Science Mathematics Preparation Online Test for Pakistani Students

If A and B are matrices such that AB=BA=I then

• A and B are multiplicative inverse of each other
  A
• A and B are additive inverses of each other
  B
• . A and B are singular matrices C
• A and B are equal D

• 15 A
• 60 B
• 90 C
• 20 D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

• Free vector A
• Null vector B
• Unit vector C
• None of these D

The values of n such that, in the binomial expansion of (1 - x)ⁿ, co-efficient of x², co-efficient of x²is 3, are

• -2, -3 A
• 2, -3 B
• -2, 3 C
• None of these D

What is the period of Cot x?

• 
  A
• 
  B
• 
  C
• 
  D

The radius of the circle (x-1)²+ (y+3)²= 64 is

• 8 A
• 
  B
• 4 C
• 64 D

The associative angle of 280°is

• 100° A
• 10° B
• 80°
  
  C
• -80°
  
  D

• 
  A
• 
  B
• 
  C
• 
  D

Sin x + Cos x = 1 x =

• 
  A
• 
  B
• 
  C
• 
  D

• 0 A
• 1 B
• -1 C
• 2 D

Which is in the solution set of 4x - 3y < 2

• (3, 0) A
• (4, 1) B
• (1, 3) C
• None D

• 
  A
• 
  B
• 
  C
• 
  D