111 Answered Questions for the topic Cosine

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 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

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...
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07/14/18

#### question about cosine law

for the cosine law c^2= a^+b^2-2abcosc, is the value for c always the longest angle of the triangle, and if so, how do you know which side is the longest given only 2 sides and 1 angle?

06/28/18

#### Find the exact value of sin 2θ, cos 2θ, and tan 2θ and the quadrant in which 2θ lies. Cos θ=-20/29, θ is in quadrant III?

Thank you!

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....
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06/06/18

#### Prove the following identity:

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

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...
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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.

12/06/17

#### Application of a sinusoidal function

Suppose a sales can be modelled by the equation;
S=200+200cos[pi/6(t+2)]
where t is time in months with t=0 corresponding to January for what month are sales equal to 0?

12/04/17

#### Why do the values of sin and cos follow such a pattern:

sin(0)=(√0)/2
sin(π/6)=(√1)/2
sin(π/4)=(√2)/2
sin(π/3)=(√3)/2
sin(π/2)=(√4)/2
cos(0)=(√4)/2cos(π/6)=(√3)/2cos(π/4)=(√2)/2cos(π/3)=(√1)/2cos(π/2)=(√0)/2
Why do they follow this pattern?...
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10/27/17

#### what is the significance between cos(45) being equal to sqrt(0.5)

I was messing with a calculator and found that the square root of 0.5 is equal to the sine and cosine of 45. I was just wondering the correlation between the two equations.

10/04/17

#### Find the values of the trigonometric functions of t

csc t = 3 and the terminal point of t is in Quadrant II.

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