Class XII Determinants Quiz 1

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Question 1

Find

• A
• B
• C
• D

Question 2

The value of the determinant

is equal to

• Acos α + cos β + cos γ
• Bcos α cos β + cos β cos γ + cos γ cos α
• C–1
• D0

Question 3

Let a, b, c be such that b(a + c) ï 0. If = 0, then the value of n is

• AZero
• Bany even integer
• Cany odd integer
• Dany integer

Question 4

If D = for x ≠ 0, y ≠ 0 then D is

• Adivisible by x but not y
• Bdivisible by y but not x
• Cdivisible by neither x nor y
• Ddivisible by both x and y

Question 5

The value of Δ = is equal to

• Ap + q
• Ba + b + c
• Cx + y + z
• D0

Question 6

If A, B and C are the angles of a triangle, then

• A0
• B1
• C2
• D3

Question 7

If ΔABC is a scalene triangle, then the value of is

• A= 0
• B≠ 0
• Ccannot say
• DNone of these

Question 8

If B is a 3×3 matrix such that B²=0 then determinant |(I+B)⁵⁰ - 50B| is equal to

• A1
• B2
• C3
• D50

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