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
Charra [1.4K]
3 years ago
13

Help me please

Mathematics
1 answer:
kari74 [83]3 years ago
6 0

Answer:

\frac{ \cos(80) }{ \sin(10) }  +  \frac{ \sin(20) }{ \cos(70) }  = 2 \\  \frac{ \cos(90 - 10) }{ \sin(10) }  +  \frac{ \sin(20) }{ \cos(9 0 - 20) }  = 2 \\  \frac{ \sin(10) }{ \sin(10) }  +  \frac{ \sin(20) }{ \sin(20) }  = 2 \\ 1 + 1 = 2 \\ 2 = 2 \\  \\  \frac{ \cot(40) }{ \tan(50) }  +  \frac{ \cos(65) }{ \sin(115) }  = 2 \\  \frac{ \cot(90 - 50) }{ \tan(50) }  +  \frac{ \cos(65) }{ \sin(90 + 65) }  = 2 \\  \frac{ \tan(50) }{ \tan(50) }  +  \frac{ \cos(65) }{ \cos(65) }  = 2 \\ 1 + 1 \\  = 2

You might be interested in
Given 3 sides of a triangle - how to tell it right, acute, or obtuse 8,11, 16
user100 [1]
Using Pythagorean theorem, we can justify our answer.
if c^2 = a^2 + b^2 then triangle is right one,
if c^2 > a^2 + b^2 then triangle is obtuse and
if c^2 < a^2 + b^2 then triangle is acute triangle.

Here a=8, b=11 and c=16
Put these values in the equation
16^2 = 8 ^2 + 11^2
256 = 64 +121
256> 185
So here c^2 > a^2 + b^2  Which means triangle is obtuse triangle.

Answer: Obtuse Triangle


6 0
3 years ago
1. Write a mixed number that is equivalent to 16
Bumek [7]

Answer:

15 4/4

Step-by-step explanation:

8 0
3 years ago
I need help on number 18
zloy xaker [14]

Answer:

Volume = 35185.8 km^{3}

Step-by-step explanation:

Recall the formula for the volume of a cone: Volume = \pi  R^{2}  \frac{h}{3}

Where R is the radius of the cone's circular base (in your case half of 80 km,(that is 40 km)

And h stands for the height of the cone (in your case 21 km)

We replace such in the formula and calculate its final value:

Volume = \pi 40^{2} \frac{21}{3} = \pi  1600 \frac{21}{3} = \pi 1600 (7) = 35185.83772...

We round it to the number of decimals your problem request (let's say to one decimal) and also include the cubic units:

Volume = 35185.8 km^{3}

7 0
3 years ago
You and your four friends are going to a concert. The total price for the tickets was $118.75 which includes a $10 service fee.
Alex787 [66]

Answer:475

Step-by-step explanation:

118.75 is the cost whitch includes a 10$ service fee

118.75x10=475

8 0
3 years ago
How could you change the equation from Part B so it has infinitely many solutions? What would infinitely many solutions mean in
Andrews [41]

Answer:

We do not have the equation for the part B, so we can not aswer it correctly.

But i will give a general answer.

We could have infinite answers always when we have more variables than linear independent equations:

This is, if we have one variable, x, we can have infinite solutions if we have no equations (or equations with no restrictions for our variable)

So if we have an equation like:

x*4 = √16*x

you can see that both sides of the equation are exactly the same, so this equation actually does not have any value, and x could take infinite different values and the equation will remain true.

If we have two variables, x and y, we will have infinite solutions if we have only one equation:

y = a*x + b

We have infinite pairs (x, y)

4 0
3 years ago
Other questions:
  • n a random sample of 10 residents of the state of Florida, the mean waste recycled per person per day was 2.8 pounds with a stan
    12·1 answer
  • Select all setd that contain the number 1.10100100010000...
    10·1 answer
  • Write an equation for the description.
    8·1 answer
  • the opposing baseball team has nine players whose weights in pounds are 174, 177, 194, 162, 196, 169, 187, 192, 178. find the me
    6·1 answer
  • Use technology or a z-score table to answer the question.
    6·1 answer
  • 6 * ? = 20. Please help it is sorta confusing
    6·2 answers
  • Put the following equation of a line into slope-intercept form, simplifying all fractions.
    6·1 answer
  • 2 more no wayyy Ok guys ik that this isn't a part of academic but i wanna say a story ... since i had 15 subs ive always wanted
    6·2 answers
  • Each year farmer records the number of pumpkins he sold for 5 weeks. The mean is 782 and the mean absolute deviation is 52. List
    7·1 answer
  • An automobile travels 140 miles in 4 hours. Find the average rate of speed
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!