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sin(arccos(3x))?

I did one like this in full yesterday.  I wish I could find it.  MMM

I'll talk you through it.

Let

theta = arccos(3x)         (becasuse remember acos returns an an angle)

Draw a right angled triangle and let one of the acute angles be theta

cos(theta) = 3x/1

so the adjacent side is 3x and the hypotenuse is 1

Use the  pythagorean theorum to find the opposite side.     sqrt(1^2-(3x)^2)

now read sin theta of the triangle :)

Welcome to the forum Brainfreezezeve :)     

Is your name eve?

I like your username except I am wondering,  

What is the extra z for?      

Why do you have to be in 15% ?

Make sure you understand and can repeat my answer or else you are not learning anything ://

92+9y+18 and 36-y2

I suspect you meant 

y^2+9y+18 and 36-y^2

\(y^2+9y+18=(y+3)(y+6)\\ ~\\ 36-y^2=6^2-y^2=(6-y)(6+y)=(6-y)(y+6)\)

So the factor that they share is (y+6)

arcsin( pi)  is undefined because pi is not within the bounds of -1 to +1

-----------------------

I suspect you really want to know what is    sin(pi )       radians

because pi is usually an angle.

Draw a circle

centre at the origin(0,0) and radius of 1 unit.

That is called a unit circle.

The angle goes from 0 to 2pi radians starting on the positve x axis and going anticlockwise.

So pi relates to -1 on the  x axis.

sin of an angle is always given by the y value on the unit circle.

What is the y value if the point is on the x axis? 

This should help you with ratios :)

http://www.purplemath.com/modules/ratio.htm

root 87 = 9.32737905309

(It cannot be simplified to another root)

6/486 simplified

6/486 divide both sides by 6

=1/81

DO NOT POST YOUR QUESTION 3 TIMES IN A ROW!!.

what is 5 over -3 times 3

(5/-3) X 3= -5

marcella divided 40.8 gallons of paint among 8 containers.how much paint is in the containers

40.8/8=5.1 gallons of paint in each container.

A) D = 0.89 × S^1.42

B) If speed is doubled, how is stopping distance affected? (Use the model found in part (a). Round your answer to two decimal places.) Stopping distance is multiplied by________?

If speed is doubled, how is stopping distance affected?

2^1.42=2.68 factor by which stopping distance is affected.

Please do not post your question more than once. See your answer under your 1st.question.

The model i found is this:

A) D = 1.26 × h^0.52

I need help on part B. Thanks. 

(b) If height above sea level is increased by 10%, by what percentage is distance to the horizon increased? ???Round your answer to the nearest whole number. (Use the model found in part (a).) 

If height above sea level is increased by 10%, that means the distance to the horizon will increase as: 1.10^.52=1.05 - 1=.05 X 100=5%

Always give an example.

simplify 5+ 3.2n-6-4.8n

=-1.6n - 1

So, what is your question?

what is the remander in fractions for 582 divited by 56

582/56=10 and the ramainder is 22.

The circumference of a coin is 8.83 cm. What is the​ diameter, radius, and the​ area? Use 3.14 for x.

Diameter=8.83/pi=8.83/3.141592=2.81cm.

Radius=Diameter/2=2.81/2=1.405cm

Area=R^2 X Pi=1.405^2 X 3.141592=6.20 square cm.

idk

-165/180=- 11/12

what is quartile 1 of these numbers: 4,8,8,3,6,4,4,3,6,7,6

first you sort them

3,3,4,4,4,6,6,6,7,8,8

then find the median which would be 6

then look at the sequence less than the median

3,3,4,4,4

and find it's median which would be 4.

and so 4 is the lower quartile or quartile 1

  4,8,8,3,6,4,4,3,6,7,6

Quartile Q1: 4
Quartile Q2: 6
Quartile Q3: 8
Average (mean): μ=5.36363636364
Absolute deviation: 17.6363636364
Mean deviation: 1.60330578512
Minimum: 3
Maximum: 8
Variance: 3.14049586777
Standard deviation σ=1.77214442633
Corrected sample standard deviation s=1.85864075457
Coefficient of variation cV=0.346526242377
Signal-to-noise ratio SNR=2.88578432946
Median: 6

1.1=1 1/10

12 over 5 times negative 15 over 22?

(12/5) X (-15/22)=

- 180/110= -1 7/11

A quotient is generally the result of division such as: 10/2=5 is the quotient.

If you mean "any number", then we have:

q-5+4=15

q=16