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# Complementary Combination MCQ Questions and Answers PDF - 124

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The e-Book Complementary Combination MCQ Questions, complementary combination quiz answers PDF download chapter 8-124 to learn online math degree programs. Solve Permutations, Combinations and Probability Test PDF, complementary combination Multiple Choice Questions (MCQ Quiz) for online college degrees. The Complementary Combination MCQ Quiz App Download: Free certification app for complementary combination, fourth root of unity, composition of functions, double angle identities, online math learning test prep for best online colleges for teaching degree.

The MCQ Quiz Value of n-1Cr + n-1Cr-1 is: n-1cr, n+1cr, ncr-1 and n+1cr+1 with "Complementary Combination" App APK Download (Free) to study online certification courses. Study permutations, combinations and probability questions and answers, Apple Book to download free sample for online college courses.

## Complementary Combination MCQ with Answers : Quiz 124

MCQ 616: The value of n-1Cr + n-1Cr-1 is

A) n+1Cr
B) n-1Cr
C) nCr-1
D) n+1Cr+1

MCQ 617: One root of the equation x² + 1 = 0 is ι the other is

A) −ι
B) ι²
C) −1
D) None of Above

MCQ 618: If ƒ(x) = √(cot-1x and g(x) = lnx,then (fog)(x) =

A) ln(cot-1x)
B) 1/2 ln(cot-1x)
C) cot-1(lnx)
D) √(cot-1(lnx)

MCQ 619: Cos2α =

A) cos²α - sin²α
B) 2sin²α +1
C) 2sin²α -1
D) 2cos²α +1

MCQ 620: Cos7θ-cosθ =

A) 2sin4θsin3θ
B) −2sin4θsinθ
C) −2sin4θcosθ
D) 2sin4θcosθ

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