35 Answered Questions for the topic Sin

02/04/21

#### If cos α = 0.923 and cos β = 0.624 with both angles’ terminal rays in Quadrant-I, find the values of (a) cos ( α + β ) = (b) cos ( β − α ) =

I need to find it the the 4th decimal any help would be appreciated?

04/06/20

#### Verify the conclusion of Green's Theorem by evaluating both sides of the equations for the field

Verify the conclusion of Green's Theorem by evaluating both sides of the equations for the field F = - 3yi + 3xjTake the domains of integration in each case to be the disk R: x2 + y2 ≤ a2 and its...
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01/30/20

#### Which expressions are equivalent to −tan θ?

1) Which expressions are equivalent to −tan θ?There may be more than one correct answer. Select all that apply.a) 1/cot(−θ)b) 1/cotθc) tan θd) −1/cotθe) −1/cot(−θ)f) tan(−θ)2) What is the correct...
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06/27/19

#### If Tan^2(t)-Sin^2(t)=Sin^a(t)/Cos^b(t), then the positive power a= ALSO the positive power b=

So, I know the first two stepssin^2(t)/cos^2(t) -sin^2(t)sin^2(t)-sin^2(t)cos^2(t)/(cos^2(t)I have no idea what to do after this? I looked and it said to factor but I have no idea why you factor...
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03/19/19

#### What is the difference between إِثْم and ذَنب and سَيِّئَة which refer to sin?

There are a number of Arabic words in Quran that refer to sin like: إِثْم and ذَنب and سَيِّئَة. *I am looking for the difference between them and their usage.*

#### Find all angles θ between 0° and 180° satisfying the given equation sin(θ) = 1/8

This is a trig question my math teacher gave and i am confused. I thought the answers were 4.2 and 172.8

Sin Math

08/07/17

#### Establish the identity sin ( π/2 + Ø) = cos Ø

Which of the following four statements establishes the identity?
A.) sin ( π/2 + Ø) = sin π/2 sin Ø+cos π/2 cos Ø=(0)sinØ+(1)cosØ=cosØ
B.) sin ( π/2 + Ø) = sin π/2 sin Ø-cos π/2...
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#### Sin and Cos functions

Without a calculator, find the exact value of:
a) sin(120)
b) cos(-3Π/4)

Sin

06/10/16

#### (sinx)^2=2-2cosx

Find all solutions of the equation in the interval [0,2pi).
(sinx)^2=2-2cosx
Write your answer in radians in terms of pi

#### Find cot(x) and sin(x), if cos(x)=-(1/5) and tan(x)<0

I really need a lot of help in math, it's my worst subject. My best is English, but that's not important.

02/09/16

#### Find sin(x) and cos(x), if cot(x)=8 and csc(x)<0

I have a few more questions about stuff like this, but all my questions are going on here separately. I think I'm STARTING to understand this stuff a little better. I just can't figure out how to...
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01/13/16

#### Graphing Trig. Functions & Inverses

Evaluate In degrees:
1. Sin^-1 (-2pi)
2. arctan (- square root 3/3)
3. sin (cos^-1(- square root 3/2)
Evaluate in Radians
1. Arctan (-1)
2. cos^-1 (- 1/2)

11/18/15

#### Solving For X In The Interval

Solve for x in the interval...
0<x<2π: 3sin2(2x+1)+2sin(2x+1)-1=0
My teacher says there should be 6 answers. I have a TI-84 calculator, so maybe there's a way to plug this in to find...
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11/18/15

#### Solve For All Values of X

Solve for ALL values of x in the real number system. If an EXACT solution does not exist, round your answers to the nearest hundredth.
sin2x = sinx

#### Find the tension in each cable necessary to keep the block from moving (either sideways or downward)

A 900-lb block is being suspended and held stationary by two steel cables as shown. The first cable (to the left of the block) makes a 70 degree angle with the horizontal, while the second cable...
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11/12/15

#### Convert from Polar to Rectangular Form

Convert the following from Polar to Rectangular Form:
r=3sinΘ(Theta)-4cosΘ(Theta)

11/11/15

#### Evalulate Basic Problems

My professor said for this problem to use inverse trig functions, half angle, and double angle identities.
Evaluate:
tan(2sin-1(4/5))
Please list the answer step by step and next to...
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11/11/15

#### Prove Basic Problems (Dealing with Cos & Tan)

Prove:
1-cos2x/1+cos2x=tan2x
Please include step by step and next to each step, please include the identity used! :)

11/11/15

#### Prove Basic Problems (Dealing with Sin, Cos, Tan)

Prove:
SQUARE ROOT OF (3cosx+4sinx)2+(4cosx-3sinx)2 = 5
Please include step by step and the identities used next to each step! :)

11/11/15

#### Proving Basic Problems (Dealing with Sin, Cos, Tan)

Prove:
sinx/sinx+cosx)=tanx/1+tanx
If you could, please list the steps and include the identities next to the steps.

11/10/15

#### Prove: (secx+tanx)^3(secx-tanx)^4=1-sinx/cosx

Prove: (secx+tanx)^3(secx-tanx)^4=1-sinx/cosx
Please show the steps and prove this by making both sides equivalent to each other. Also, please include which identities follow with each step! :)

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