# Trigonometry: Question Preview (ID: 14055)

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what is trigonometry?
a) The study of angles and of the angular relationships of planar and three-dimensional figures
b) cames from the Greek term trigōnon means"triangle measure"
c) the study of how the sides and angles of a triangle are related to each other.
d) all are correct

The trigonometric functions are most simply defined using the ___________.
a) triangles
b) unit circle
c) trigonometric functions
d) trigonometric functions

2 pi in revolution is _________
a) 1
b) 4
c) 3
d) 2

sine is equals to__________
c) hypotenuse over opposite
d) opposite over hypotenuse

90 degrees is ________ in radian measure
a) pi
b) pi over two
c) 3 pi over two
d) 2 pi

which of the following is true about right triangles
a) oblique triangles are right triangles
b) the hypotenuse of the right triangle is the shortest side
c) any side of the right triangle can be solve using pythagorean theorem
d) all are wrong

what trigonometric identity you will use in this equation: tan(θ)cos(θ) = sin(θ)
a) pythagorean identity
b) quotient identity
c) reciprocal identity
d) sum to product

sin (B) is equals to____________
a) 1/cos (B)
b) 1/csc (A)
c) tan (B) sin (B)
d) tan (B) cos (B)

what formula use in finding the area of triangle with all sides given
a) law of cosines
b) Heron's formula
c) 1/2 base x height
d) all are correct

in what quadrant is cosine is always positive