ECAT Pre General Science MCQ Test With Answer for Mathematics Chapter 16

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  D

If sin 6θ+ sin 4θ+ sin 2θ, thenθ=

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If 4 sin²θ=1, then values ofθare

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General solution of tan 5θ= cot 2θis

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The solution of the equation cos²θ+ sinθ+ 1 = 0 lies in the interval

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• none of these D

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The smallest positive root of the equation tan x - x = 0 lies on

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General solution of 1 + cos x = 0 is

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• No solution A
• One real solution B
• More than one real solution C
• None of these D

If Sin A = sin B, cos A = cos B, then the value of A in terms of B is

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• trigonometric equation A
• conditional equation B
• identity C
• None D

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• none of these D

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• 7 A
• 5 B
• 6 C
• None of these D

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• none of these D

By expressing sin 125° in terms of trigonometrical ratios, answer will be

• sin 65° = 0.9128 A
• sin 55° = 0.8192 B
• sin 70° = 0.5384 C
• sin 72° = 0.1982 D

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• all D

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• none of these D

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• both a & c D

The general value ofθsatisfying the equation 2 sin²θ- 3 sinθ-2 = 0 is

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  D

One root of the equation cos x - x + 1/2 = 0 lies in the interval

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  C
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  D

• A finite non-empty set A
• Null set B
• Both a and b C
• None of these D

Considering Cosine Rule of any triangle ABC, possible measures of angle A includes

• Angle A is obtuse A
• Angle A is acute B
• Angle A is right-angle C
• All of above D