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Trigonometry > Trig exam one > Flashcards

Trig exam one Flashcards

1
Q

Reference angle

A

The acute angle formed by the terminal side of an angle in standard position and the x-axis

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2
Q

Acute angle

A

Angle that measures less than 90 degrees

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3
Q

Obtuse angle

A

An angle that measures more than 90 degrees but less than 180

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4
Q

Initial side

A

The starting position of a ray

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5
Q

Terminal Side

A

The position of the ray after rotation

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6
Q

Coterminal angles

A

Angles that have the same terminal and initial sides

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7
Q

Pi radians

A

1/2 of a revolution

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8
Q

pi over 2 radians

A

1/4 of a revolution

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9
Q

pi over 3 radians

A

1/6 of a revolution

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10
Q

pi/4 radians

A

one eight of a revolution

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11
Q

Quadtrental angles

A

An angles whose side lies on the X-axis or y-axis such as zero , pi over 2, or 3pi/2

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12
Q

Two angles whose sum is 90 degrees

A

Complementary angles

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13
Q

Two angles whose sum is 180 degrees

A

Supplementary angles

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14
Q

S=R(theta)

A

Arc length formula

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15
Q

Unit circle equation

A

x^2+y^2=1

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16
Q

Sine(T)

A

y

17
Q

Csc(T)

A

1/y

18
Q

Cos(T)

A

x

19
Q

Sec(T)

A

1/x

20
Q

Tan(T)

A

y/x

21
Q

Sine

A

Opposite over hypotenuse

22
Q

CSC

A

Hypoteneuse over opposite

23
Q

Cos

A

adjacent over hypotenuse

24
Q

Sec

A

hypotenuse over adjacent

25
Q

Tan

A

opposite/adjecent

26
Q

Cot

A

adjacent/ opposite

27
Q

R=square root of x squared+Y squared

A

How to find any trig angle

28
Q

Quadrant one

A

Cos and sine are both positive

29
Q

Quadrant 2

A

cosine is negative sine is positive

30
Q

Quadrant 3

A

both cosine and sine are negative making tangent positive

31
Q

quadrant 4

A

cosine is positive sine is negative

32
Q

Reference angle

A

The acute angle formed by the terminal side of an angle in standard position and the x axis

33
Q

Amplitude e

A

The absolute value of a

Trigonometry (1 decks)

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