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Rudik [331]
3 years ago
5

1 - 2sin^2(pi/3) = _____ cos pi/6 sin pi/6 cos 2pi/3 sin 2pi/3

Mathematics
1 answer:
ZanzabumX [31]3 years ago
6 0

Apply the cosine double angle identity to get:

Cos 2PI/3

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HELPPPP look at imag
nikklg [1K]

Answer:

the answer is D

Step-by-step explanation:

dram is 40 film is 24  40 divided by 8 is 5 and 24 divided by 8 is 3 so it equals 5:3

3 0
3 years ago
I need help in Pre-Algebra! This assignment is due today & I have no idea how to do it, PLEASE HELP!
GuDViN [60]
F(x) = 2/3x - 1......f(x) represents y

to find ur points, sub in any number for x and solve for f(x) or y
lets let x = 0

y = 2/3(0) - 1
y = -1
so when x = 0, y = -1......so (0,-1) is one point

let x = 3
y = 2/3x - 1
y = 2/3(3) - 1
y = 6/3 - 1
y = 2 - 1
 y = 1.....so when x = 3, y = 1....(3,1) <== another point

let x = 6
y = 2/3(6) - 1
y = 12/3 - 1
y = 4 - 1
y = 3....so when x = 6, y = 3.....(6,3) <== another point

let x = 9
y = 2/3(9) - 1
y = 18/3 - 1
y = 6 - 1
y = 5.....so when x = 9, y = 5....(9,5) <== another point

let x = 12
y = 2/3(12) - 1
y = 24/3 - 1
y = 8 - 1
y = 7...so when x = 12, y = 7....(12,7) <== ur fifth point

=========================
f(x) = 2/3x - 1
y = 2/3x - 1....in y = mx + b form, ur b represents the y int. So ur y intercept(where the line cross the y axis) is (0,-1)

to find the x intercept, sub in 0 for y and solve for x
y = 2/3x - 1
0 = 2/3x - 1
-2/3x = -1
x = -1 * -3/2
x = 3/2.....so ur x int (where ur line crosses the x axis) is (3/2,0)

now just plot all the points we just found, connect them, and they should make a straight line

4 0
4 years ago
(20 points)Solve the equation cos x = sin (x + 22)
Law Incorporation [45]

Answer:

\bold{x = 34^\circ}

Step-by-step explanation:

Given:

cos x = sin (x + 22^\circ)

To solve:

The given equation.

Solution:

First of all, let us consider an important property of sine and cosine.

sin(90^\circ-\theta )=cos\theta

OR

cos(90^\circ-\theta )=sin\theta

We can apply above property to solve for x as per given equation.

cos x = sin (x + 22^\circ)

Changing cosx to sine form:

cosx=sin(90^\circ-x)

cosx=sin(90^\circ-x) = sin(x+22^\circ)

\therefore 90^\circ-x=x+22^\circ\\\Rightarrow 90^\circ-22^\circ=x+x\\\Rightarrow 2x=68^\circ\\\Rightarrow \bold{x = 34^\circ}

So, solution to the equation cos x = sin (x + 22^\circ) is:

\bold{x = 34^\circ}

7 0
3 years ago
Can someone plz help me?​
Ivahew [28]

Answer: x = 2

Step-by-step explanation: the interior angles of a rhombus add to 360 degrees and since half of 360 is 180, create the equation 130 + (36 +7x) and set it equal to 180. when solved 130 + (36 +7x) = 180 you get x =2

5 0
3 years ago
Read 2 more answers
What is the range?<br> 2 4 4 5 4
xxMikexx [17]

Answer:

3 :)

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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