Trigonometry - Arithmetic Aptitude Questions and Answers

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Flat surface like blackboard is classified as

A.

plane

B.

vertex plane

C.

triangular plane

D.

trigonometrical plane

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By expressing cos 82° in terms of trigonometrical ratios, answer will be

A.

− cos 29° = -0.8746

B.

− cos 38° = -0.7880

C.

− cos 89° = -0.2319

D.

− cos 98° = -0.1392

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For any acute angle, cosine A is equal to

A.

cos (180° - A)

B.

-cos (180° - A)

C.

cos (180° + A)

D.

-cos (180° + A)

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If cos 55° and sin 55° = 0.8 each then answer of 3 cos 125° + 5 sin 125° is

A.

0.6

B.

1.6

C.

2.3

D.

2.5

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Considering Cosine rule, b² + c² - a²⁄2bc is equal to

A.

cos A

B.

cos B

C.

cos C

D.

cos D

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If sine is 0.2586 then value of acute angle is

A.

14.99°

B.

16°

C.

17.98°

D.

18°

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Dimensions of solid includes

A.

length

B.

breadth

C.

height

D.

all of the above

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Considering 0° < x < 180°, angle of cos x = -0.8726 is

A.

150.76°

B.

160.72°

C.

165.82°

D.

167.35°

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1 + tan²2θ =

A.

sec²θ

B.

csc²θ

C.

csc²2θ

D.

sec²2θ