121 Answered Questions for the topic Sine

12/07/20

Pre Calculus Question

Given 𝑠𝑖𝑛𝜃 = −1 and 𝑐𝑜𝑠𝜃 > 0, find (a) 𝑠𝑖𝑛2𝜃, and (b) 𝑐𝑜𝑠2𝜃
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08/30/20

I need help figuring out how to solve this
A gasoline and air mixture is ignited by spark plugs, which forces the pistons to move up and down, rotating the crankshaft. The animation on the left shows a single piston moving up and... more
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05/18/20

Law of sines and cosines
Find b, given a=10 , c=8 and m<B=40o
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05/18/20

Law of sines and cosines
In Triangle ABC, m<A=30o , m<B=80o , a=18in. Find the length of C.
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05/15/20

Given cos(t)=-7/25 for pi/2 < t < pi, find the value of sin (t)
I appreciate all of the tutors and experts on here, thanks so much for saving me and many other students.
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04/04/20

are sine and cosine equal for non-acute complementary angles?
for example, when writing a proof, is it logical to write the following:cos(-ø)=sin(π/2+ø) (∵ the cosine of an angle is equal to the sine of its complementary angle)I ask because this... more
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03/18/20

Trignometric Functions
Find the value of each trigonometric function using the given angle and a calculator. Round answers to three decimal places.Cos 77 °
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12/04/19

Given Cos (2x)= -24/25, 2nd Quadrant (pi/2 <x< pi); What is Sin(x) ?
Am I missing something big here? I've gotten around to making sin(2x)=7/25 but I don't understand how to go from double angle to single angle using identities.
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11/26/19

Consider the work below for verifying the given identities. One step in each identity is missing. Fill in the box showing the correct work for the missing step
First Stepcot θ sec θ csc2 θ - cot3 θ sec θ = csc  θSecond Step (missing step)Third Stepcot θ sec θ (1) = csc θFourth Stepcos θ 1------- * ------ = csc θsin θ... more
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11/26/19

If sinx cosx = 2/5 and tan x = 1/2, then sin^2x =

If sinx cosx = 2/5 and tan x = 1/2, then sin2 x= A. 1/5 B. 2/5 C. sqrt(5)/5 D. 2sqrt(5)/5 E. 3/5
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07/09/19

Write −6sin(8t)+5cos(8t) in the form Asin(Bt+ϕ) using sum or difference formulas.
-6sin(8t)+5cos(8t)= Please provide all steps! Thank You!
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07/09/19

If cos^2sin^4x= A+Bcos2x+Ccos4x+Dcos2xcos4x, then A= B= C= D=
Please tell me how you got it by showing steps!! what does A, B, C, and D equal in the second equation?
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07/08/19

Sine and Cosine
Why can sine and cosine never be greater than 1? 
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07/08/19

Sine Cosine and Tangent
Why can sine and cosine never be greater than 1? Why is it that cosecant and secant should be greater than 1? Why are tangent and cotangent sometimes undefined?
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07/07/19

Write −6sin(8t)+5cos(8t) in the form Asin(Bt+ϕ) using sum or difference formulas. −6sin(8t)+5cos(8t) =

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07/07/19

If sinx+cosx=sqrt(2)sin(x+Aπ), then the number 0<A=___________ <2
please provide all steps for the solution
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07/07/19

Use the product to sum formula to fill in the blanks in the identity below: sin(7x)cos(4x)=1/2(sin(_____x)+sin(______x))
please provide all steps for the solution
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07/07/19

Use the product-to-sum formula to find the exact value: If cos37.5∘sin7.5∘=(√A−B)/4, then A= B=
please provide all steps for the solution
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07/07/19

Use the product-to-sum formula to find the exact value: If 2sin52.5∘sin97.5∘=2√+A√2, then A=
please provide all steps for the solution
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07/07/19

Use the sum-to-product formula to simplify the expression: If sin41∘+sin19∘=sinA∘,0<A<90, then A= ____degrees
please provide all steps for the solution!!!!
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07/02/19

Express in terms of x: sin(2arctan(x))
PLEASE give clear steps! Thank You!If the answers ends up having square roots, can you simply it where it does not
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07/02/19

Find tan(arcsin(4/6) + arccos(10/17))

PLEASE show clear steps!!If the answers ends up having square roots, can you simply it where it does not
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03/22/19

Triangle Area in sine
The perimeter of a triangle ABC is L metres. Find the area of the triangle in terms of L and the triangle’s angles α, β and γ.(Let AB=x. Using the sine rule, first find the other side lengths in... more
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01/11/19

Trigonometry Question!

A weather ballon is tethered to the ground at an angle of inclination equal to 30°. The string used is 400ft long. Caleb and Elissa are at different positions on level ground in line with the... more
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07/17/18

How do I use sin, cos, tan, and their inverse functions to find missing values?
I feel rather silly asking this question on here, but I have been looking up videos on how to do the trig functions sin, cos, tan, and their inverse functions and still cannot understand. I was... more
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