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
DIA [1.3K]
3 years ago
7

Cosx=4/5 what is sin2x cos2x and tan2x

Mathematics
1 answer:
earnstyle [38]3 years ago
4 0

Answer:

-24/5

Step-by-step explanation:

The solution to the problem is as follows:

cscx < 0 means 1/sinx < 0, or sinx < 0.  

sinx = -3/5 because you're dealing with a 3-4-5 triangle, and we established

sinx is negative.  

sin2x = 2sinxcosx = 2*-3/5*4/5 = -24/25  

cos(2x) = cos^2(x) - sin^2(x) = 16/25 - 9/25 = 5/25 = 1/5  

tan2x = sin2x / cos2x = -24/5

You might be interested in
Nate's weekly pay increased from $710 to $770. Which of the following is closest to the
Maksim231197 [3]

Answer:

about 7.2 I think

Step-by-step explanation:

if his pay went up all the way to 770 it would be going up either 7.8 or 7.2

7 0
3 years ago
What is 4 1/8 - 2 2/3 to the nearest whole number
NARA [144]

Answer:

1 11/24

Step-by-step explanation:

:))

8 0
3 years ago
Quick algebra 1 question for 25 points!<br><br> Only answer if you know the answer, Tysm!
zzz [600]

Using a quadratic regression equation, it is found that the prediction of volunteers in year 10 is of:

A. 47.

<h3>How to find the equation of quadratic regression using a calculator?</h3>

To find the equation, we need to insert the points (x,y) in the calculator.

In this problem, we have that the function initially increases, then it decreases, which means that it is a quadratic function. The points (x,y) to  be inserted into the calculator are given as follows:

(1, 20), (2,17), (3, 16), (4,16), (5,18), (6,21), (7,25), (8,31)

Inserting these points into the calculator, the prediction of y for a value of x is given as follows:

y = 0.702x^2 - 4.726x + 23.857

Hence, when x = 10, the prediction is:

y = 0.702 x 10² - 4.726 x 10 + 23.857

y = 47.

Hence option A is correct.

More can be learned about a quadratic regression equation at brainly.com/question/24028025

#SPJ1

4 0
1 year ago
Find AB using the segment addition postulate.
Elena-2011 [213]
Answer : AB = 12

Explanation:

2x + 6 + 5x - 3 = 24
7x + 3 = 24
x = 3

AB = 2x + 6 = 2(3) + 6 = 12
7 0
2 years ago
​ 0.5(6d+10)=17 what is the value of d
mezya [45]
The value of D should be 4

4 0
3 years ago
Other questions:
  • 7. Bruno noticed today's gasoline price at the local convenience store was advertised as $3.40 per gallon. This price is 15% abo
    12·2 answers
  • Which statement accurately describes how to perform a 90° counterclockwise rotation of point A (−1, −2) around the origin? Creat
    11·2 answers
  • If PX = 56, Find (x - 2)!
    11·1 answer
  • Cameron wanted to buy some pens.They had 18 pens for $ 6.84 for 30 pens for $8.40 which is a better deal?
    11·2 answers
  • Q11. The ratio of angles of a quadrilateral are<br>in 3: 5:9:13. Find the angles.​
    11·1 answer
  • Multiply.
    8·2 answers
  • If y varies inversely as x, and y = 4 when x = 16, what is the value of y when x = 8?
    12·1 answer
  • The graph of a function is a parabola that has a minimum at the point (-3,9). Which equation could represent the function?
    15·1 answer
  • John called a plumber to fix a leak in his bathroom. The
    7·1 answer
  • Which of the following is not equal to 64? (the numbers after the comma are exponents
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!