111 Answered Questions for the topic Sine

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.

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

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

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!

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?

07/08/19

Sine and Cosine

Why can sine and cosine never be greater than 1? 

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?

07/07/19

If sinx+cosx=sqrt(2)sin(x+Aπ), then the number 0<A=___________ <2

please provide all steps for the solution

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

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

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

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!!!!

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

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

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

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

06/28/18

Help simplifying?

simplify.   2sin2x/2 -1

06/27/18

Given the function value and the quadrant restirction, find θ?

Sin θ=-0.9744   (270°, 360°)

06/06/18

Prove this identity:

prove the following identity: 2sin^2(x)/sin2(x)+cot(x)=sec(x)csc(x)   please note that the cot(x) is not with the sin2(x) as a part of the denominator. The 2sin^2(x)/sin2(x) is its own fraction.... more

06/06/18

Prove the following identity:

prove the following identity:   2sin^2(x)/sin2(x)+cot(x)=sec(x)csc(x)

04/19/18

Sine & Cosines - heading & distance

You are at point A , to the west side of a tall mountain.  You are planning a hike around the mountain to point C, which is 9 miles east of A.  You start by hiking a distance of 6.6 miles on a... more

03/02/18

See Description

One end of a wire is attached to the top of the tower and the other end to a stake in the ground that is 44’ from the base of the tower. The wire makes a 64 degree angle with the flat ground. If... more

01/18/18

What is csc2x if tanx = -3/4 and pi/2 < x < pi

The first "<" is a one with a line under it.
1 3 4 5

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