ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 15 (Inverse Trigonometric Functions)

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sin -1(sin2π/3) =

• π/2 A
• 2π/3 B
• -3π/2 C
• π/3 D

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Cos-1 (-x) =

• -x A
• 1/x B
• tan-1 x C
• π-cos-1 x D

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The value of sin [ arc cos (-1/2)] is

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The range of the principle cos function is

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• 0 A
• -1 B
• 1/2 C
• 1 D

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The domain of the principle cos function is

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• Cos 2x = sin 4y A
• Cos 4y = cos 2x B
• Cos 3y = sin 4x C
• None of these D

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Cos (cos4π/3)=

• π/2 A
• π/3 B
• 2π/3 C
• -π/3 D

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If cos (2 sin-1 x) = 1/9 , then what is the value of x?

• 1/3 A
• -2/3 B
• 2/3 C
• 2/3 , -2/3 D

The domain of the function y = sin x , is

• -π/2≤ x≤ π/2 A
• π/ ≤ x≤ π B
• -2π ≤ x≤ 2π C
• -1 ≤ x≤ 1 D

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tan(cot^-1x) is equal to

• cot(tan^-1x) A
• tan x B
• secon x C
• None of these D

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• π A
• π / 2 B
• π / 3 C
• π / 4 D

The range of the principle cot function is

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