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Natasha2012 [34]
3 years ago
7

Evaluate: sec(5 pie/4)

Mathematics
1 answer:
zysi [14]3 years ago
7 0

Answer:

sec(\frac{5\pi}{4})=-\sqrt{2}

Step-by-step explanation:

sec(\frac{5\pi}{4})\\\\=\frac{1}{cos(\frac{5\pi}{4})}\\ \\=\frac{1}{-\frac{\sqrt{2}}{2}}\\ \\=-\frac{2}{\sqrt{2}}\\ \\=-\frac{2\sqrt{2}}{2}\\ \\=-\sqrt{2}

It really helps to use the unit circle for solving these kinds of problems. I've attached one for your convenience. Note that a point on the unit circle, given the angle in radians, is defined as (cos\theta,sin\theta).

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Subtract <br> (5x+3) -(x+2) <br><br><br><br><br>A. 4x+1<br>B. 5x+5<br>C. 4x+5<br>D. 5x+1​
miss Akunina [59]

Answer:

4x+1

Step-by-step explanation:

Collect the like therms and then substract the numbers

3 0
4 years ago
Major arc JL measures 300°. Which describes triangle JLM?
Fed [463]

Answer: equilateral

Step-by-step explanation:

8 0
3 years ago
Solve the following system of equations by graphing. Label the solution and all intercepts.
olganol [36]

Answer:

(4,4)

y = 4

x = 4

Step-by-step explanation:

First we need to input y = 1/2x + 2 into 4x - 2y = 8.

4x - 2 (1/2x + 2) = 8 <-- Then solve

4x - 1x + -4 = 8

3x - 4 = 8

    +4   +4

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

3x    =    12

3             3

x = 4

Now we need to use x and apply it to find y.

y = 1/2x + 2

y = 1/2(4) + 2

y = 2 + 2

y = 4

Now to graph go on the x axis (horizontal axis) and go to 4, then up 4 on the y axis.

You need to graph the point (4,4).

I hope this helps!

6 0
3 years ago
Read 2 more answers
I did the first question already I need help with the second pls :&gt;
OleMash [197]

Answer:

The box is considered a cube so,

4 x 4 = 16

56 divided by 16 = 3.5 is your height

1/2 x 1/2 x 1/2 = 1/8.

56 divided by 1/8 = 7 cubes

5 0
3 years ago
3x+7=5x-21
schepotkina [342]
Just get only one of  the placeholder on one side by itself
and do the same thing to both sides so it stays equal
3x+7=5x-21
add 21 to both sides
3x+28=5x
subtract 3x from obht sides
28=2x
sivide both sides by 2
14=x
7 0
3 years ago
Read 2 more answers
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