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Cosine function
Page 2
Questions (135)
Given that tan(Q) = -3/4 and Q is in the second quadrant tell the value of the cosQ
cos=-4/5 Correct?
1 answer
asked by
Hannah
388 views
Show that cos(pi - θ) = -cos θ
for every angle θ
1 answer
asked by
Frankie
367 views
How come cosine of 225 degrees is a positive number i thought it was negative because it's reference angle would be 45 degrees
7 answers
asked by
Trig
607 views
If 0 < (theta) and cos(theta)=0.5, then what is the value of cos(2theta)?
3 answers
asked by
Parker
481 views
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle
1 answer
asked by
Lucy
1,073 views
y = cos(4x/3 minus 1)
amplitude? Period? Two x - intercepts? y-intercept? Domain? Range? Shift along x? Shift along y? Kind of
2 answers
asked by
Anna
589 views
i have a bunch of sunrise points, and i have to make a cosine function for it. what assumptions must be made?
1 answer
asked by
beckii
298 views
given that 180¡ã¡ÜA¡Ü 270¡ãand tan A=3/7,
what is the exact value of cos A? i can't get my head around this...can someone
1 answer
asked by
Pauline
368 views
how would i find the degrees of cos x= 3/2
if (0 <or= theta < 360)? i've tried putting it in my calculator with cosine^-1 but im
1 answer
asked by
Marie
539 views
Which cosine function has maximum of -2, and a period of 2pi/3
4 answers
asked by
Kathryn
2,518 views
Find cosθ, in degrees, if the y-coordinate of the point where the terminal side of θ intersects the unit circle is √2/2 ,
1 answer
asked anonymously
33 views
A ray from the positive x-axis is rotated −270° . What is the cosine of the angle formed by this ray?
1 answer
asked anonymously
37 views
what is the value of cos 0 if the terminal side of 0 and the unit circle intersect at point (1/√2, -1/√2)
1/√2 1/2 -1/√2
1 answer
asked anonymously
42 views
Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).
4 answers
asked by
Molly
1,266 views
If sin(x) = /45 and cos(y) = 5/13 with both x and y terminating in quadrant 1 find the exact value of cos(x-y)
cos(4/5 - 5/13) Is
1 answer
asked by
Bryan
1,080 views
find all the values of X between 0 and 2π such that cos(3x-π/2) = -√3/2
2 answers
asked by
diego sanchez
850 views
Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from
1 answer
asked by
T-Man
740 views
a ray on the positive x-axis is rotated -450°. what is the cosine of the angle formed by this rotation?
1 answer
asked anonymously
43 views
Write an equation of a cosine function with Amplitude=4, Period=pi/2, and Phase Shift=-pi?
1 answer
asked by
Purplechick4
630 views
Evaluate giving exact values and identities. Calculator based solutions are not acceptable. Thanks for any help
cos (-5pi/12)
2 answers
asked by
Carmen
632 views
Find cos(theta) if (-15, 8) is a point of the terminal side of theta.
2 answers
asked by
Britt
563 views
Find, to the nearest tenth of a degree, all positive angles less than 360° where cos θ = -0.5982
2 answers
asked by
micey
539 views
A ray from the positive x-axis is rotated −270°
. What is the cosine of the angle formed by this ray?(1 point)
1 answer
asked anonymously
69 views
What is cos0°
? (1 point) cos0°=
1 answer
asked anonymously
32 views
If the cosine of an angle is θ √1/2
, what is θ ? You may assume that 0°≤θ≤180° .
1 answer
asked anonymously
55 views
What is the value of cosθ if the terminal side of θ and the unit circle intersect at point (12√,−12√) .(1 point)
Response
1 answer
asked anonymously
67 views
A ray from the positive x-axis is rotated −270° . What is the cosine of the angle formed by this ray?(1 point)
1 answer
asked anonymously
33 views
If the cosine of an angle θ is 1√2 , what is θ ? You may assume that 0°≤θ≤180° . (1 point)
1 answer
asked anonymously
19 views
the productivity of a person is modelled by the function y=5cos(pi/2 t)+5, where t is in hours and t>and equal to 0. if the
2 answers
asked by
Stacy
533 views
Could someone help me with this question please?
Which angle between 0° and 360° has the same cosine as the angle 55°? Thanks
2 answers
asked by
Tandy
518 views
A person who was listening to a siren reported that the frequency of the sound fluctuated with time, measured in seconds. The
2 answers
asked by
John
504 views
Two consecutive days of the week experience a maximum temperature of 90 degrees F at 1:00pm and a minimum temperature of 44
2 answers
asked by
Alex
496 views
Given triangle RST, find cos T.
2 answers
asked by
Anonymous
487 views
x + 5 = 9sin theta, 0 < theta < pi/2 , cos(2theta) in terms of x
cos(2 theta)
4 answers
asked by
Samantha King
434 views
Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from
1 answer
asked by
tom
464 views
If angle x lies in quadrant 3 and cos(x)= -0.6
Find cos(3pi/2-x)
1 answer
asked by
Dan
458 views
For value cos (8ð/3).
b) write cos (8ð/3) in terms of an algebraic sign and cosine of the reference angle find the exact value
7 answers
asked by
sam
435 views
find the cosine for an angle that has a sine of 340√/20 and is in quadrant ii. use the pythagorean identity
1 answer
asked anonymously
42 views
Given sine, theta, equals, start fraction, 3, divided by, 4, end fractionsinθ=
4 3 and angle thetaθ is in Quadrant I, what
1 answer
asked anonymously
50 views
A ray on the positive x-axis is rotated −450°
. What is the cosine of the angle formed by this rotation?(1 point)
1 answer
asked anonymously
60 views
Use the table to answer the question.
x 0 π2 π 3π2 2π cosx −4 0 4 0 −4 Given the values in the table, determine the
1 answer
asked anonymously
42 views
Use the table to answer the question. x 0 π2 π 3π2 2π cosx −4 0 4 0 −4 Given the values in the table, determine the
1 answer
asked anonymously
36 views
Which is an equation of the cosine function that has a period of π5 ?(1 point) Responses f(x)=cos(x5) f left parenthesis x
1 answer
asked anonymously
33 views
44) Angle x lies in the third quadrant, and tan x = 9/40
. Determine an exact value for cos(2x).
3 answers
asked anonymously
28 views
d) cos(x + y) cos(x − y) = cos2 x + cos2 y − 1
1 answer
asked anonymously
18 views
What is the midline of the cosine function? (1 point) Responses d=−78 d equals negative Start Fraction 7 over 8 End Fraction
1 answer
asked anonymously
10 views
Complete the missing values in the table for the function f(x) = cos(6x) (5 points) Put responses in the correct input to answer
1 answer
asked anonymously
13 views
Review the table of values to determine the minimum, maximum, and midline for the cosine function. 0, pi over 2, pi, 3 pi over 2
1 answer
asked anonymously
22 views
x=0 what is cos x?
1 answer
asked anonymously
10 views
When x is 0 what is cos x?
1 answer
asked anonymously
10 views
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Parent Categories (6)
Circular functions
Evaluating trigonometric functions
Functions
Rotations and Angles
Trigonometric Functions
Trigonometry