1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
loris [4]
3 years ago
7

Evaluate sec 240Á without using a calculator by using ratios in a reference triangle.

Mathematics
2 answers:
s344n2d4d5 [400]3 years ago
6 0
Sec∅ = 1/cos∅
= 1/cos(240)
= 1/cos(180 + 60)
= 1/-cos(60)
= 1/(-1/2)
= -2
balandron [24]3 years ago
6 0
<span>60=pi/3
cos 60 = 0.5
</span><span>sec 240 = 1/ cos 240
 cos 240 = cos (180+60)
cos (180+x) = -cos x
</span><span>cos (180+x) = -cos x
so
cos 240 = -cos 60
              = -0.5
</span><span> sec 240 =1/ cos 240
              = 1/(-0.5)
              = -2</span>
You might be interested in
PLEASE ANSWER 1-6 &amp; SHOW YOUR WORK
Minchanka [31]
Where is 1-6 at ????

4 0
3 years ago
Please help me with NUMBER 7 !! Thank you so much! 20 points!! :))
mart [117]

Answer:

x<-3 or x>-1

Step by step explanation:

Start with -5x>15. To get x by itself, we have to divide each side by -5. When we do that we get x<-3. (Don't forget to flip the sign when dealing with negative  · and ÷.) Now answer the second equation. x-5>-6 To get x by itself, add 5 to both sides to get x>-1. Now we have x<3 or x>-1.

8 0
3 years ago
I need help with this geometry question!
Ksenya-84 [330]
Hello there! So, this is a quadrilateral and quadrilaterals equal 360 degrees. Let’s combine like terms to start off. 39x + 9 = 360. First, let’s subtract 9 from both sides to get 39x = 351. Next, divide each side y 39 to isolate the “x”. When you do that, x = 9. Now, let’s plug in the values for each, when you do, here are the final answers.

x = 9
E = 75 degrees
F = 91 degrees
G = 89 degrees
H = 105 degrees

Those are all of the angle measurements, but it wants the measurement of angle H. Therefore, that angle measurement is 105 degrees.
4 0
4 years ago
Yesterday Jamal scored -20
Nastasia [14]
That’s all? That give me no info to help you bud
8 0
3 years ago
Which of the following is a prime number 6765 63 + 60
natulia [17]
Your answer is 67 hope this helps
6 0
3 years ago
Other questions:
  • Solve x and y simultaneously y=x^2-x-6 and 2x-y=2
    13·1 answer
  • What’s the perimeter of a rectangle that’s 90 units
    14·1 answer
  • I NEED MAJOR HELP PLEASE&lt; I WILL LITERALLY GIVE ALL MY POINTS AWAY TONIGHT!! MULTIPLE QUESTIONS/MULTIPLE SUBJECTS
    9·1 answer
  • Solve for x. -3x + 10 =34
    9·2 answers
  • Please help I’m doing online classes and i’m stuck
    8·2 answers
  • Solve for the missing sides and show all the work.
    11·1 answer
  • Find the equation of the line that is perpendicular to y = – 1 3 x + 2 and passes though the point (–5, 2)
    14·2 answers
  • Erin uses a spinner divided into four equal sections to decide which drink she’ll have with her lunch. The sections represent wa
    11·1 answer
  • Helppp!! Summer math Packet!<br> (+4) +(-7) =
    8·2 answers
  • - 16 + ( - 12 ) - ( - 40 )<br>​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!