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
alexandr402 [8]
3 years ago
10

Prove the identity sin(x-y)/cosxsiny=tanxcoty-1

Mathematics
1 answer:
photoshop1234 [79]3 years ago
6 0

Step-by-step explanation:

\frac{sin(x - y)}{cos \: x \: sin \: y}  \\  \\  =  \frac{sin \: x \: cos \: y -cos \: x \: sin \: y }{cos \: x \: sin \: y}  \\  \\  =    \frac{sin \: x \: cos \: y }{cos \: x \: sin \: y}   +   \frac{-cos \: x \: sin \: y }{cos \: x \: sin \: y}  \\  \\ =    \frac{sin \: x \:}{cos \: x }  \times  \frac{cos \: y }{sin \: y}   -    1 \\  \\  = tan \: x \: cot \: y - 1 \\  \\  \therefore \:  \frac{sin(x - y)}{cos \: x \: sin \: y} = tan \: x \: cot \: y - 1  \\  \\ thus \: proved \\

You might be interested in
Use the table below to find f ( 4) - f (0) + f(-8), Choose your correct response from the options below.
marshall27 [118]

Answer:

-4f

Step-by-step explanation:

Hi! Let's work on simplifying this.

f(4) = 4f

f(0) = 0, because anything x 0 is 0

f(-8) = -8f

Our equation is 4f + -8f

We can get rid of the plus negative...

4f - 8f

So we get:

-4f

6 0
3 years ago
For one batch of cookies, the ratio of ounces of butter to ounces of flour is 2 to 3
dezoksy [38]

Answer: For 3 Batches, 6 butter & 9 flour

For 5 Batches, 10 butter & 15 flour

Step-by-step explanation:

1 Batch = 2:3

So, whatever we times up by in batches we can do the same to the ingredients.

1 batch = 2:3

multiply 3

3 batches = 6:9

and so on…

3 0
3 years ago
Read 2 more answers
The difference of the same side angles of two parallel lines is 35°. Find all angles
Pavel [41]
<h3>Answer:</h3>

All acute angles are 72.5°; all obtuse angles are 107.5°.

<h3>Explanation:</h3>

Angles on the same side of a transversal cutting parallel lines have measures that total 180°. If o and a represent the measures of the obtuse and acute angles, respectively, then we have ...

... o + a = 180

... o - a = 35

Adding these two equations gives ...

... 2o = 215

... 215/2 = o = 107.5 . . . . degrees

Then the other angle is ...

... a = 107.5 - 35 = 72.5 . . . . degrees

_____

All corresponding angles have the same measures. All vertical angles have the same measures. So the 8 angles that arise from the intersection of the transversal with these two parallel lines will have one or the other of these two measures.

3 0
4 years ago
Find x and y for the following problem.
Luba_88 [7]

Answer:

x = 5/4

y = 7/4

Step-by-step explanation:

The smaller triangle and the larger one are similar, so the sides are proportional.

(x+5)/5 = 10/8

x/5 + 1 = 1/4 + 1 . . . . . divide it out

x/5 = 1/4 . . . . . . . . . . .subtract 1

x = 5/4 . . . . . . . . . . . . multiply by 5

___

For y, you can do exactly the same computations, replacing every instance of 5 with a 7. Then you get ...

y = 7/4

8 0
3 years ago
Is 2/3 equal to 1/4?
MrMuchimi

Answer:

No

Step-by-step explanation:

2/3 in decimal is .6 repeating

1/4 in decimal is 0.25

therefore we cannot conclude that 2/3 is equal to 1/4

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the length of AA' ?
    10·1 answer
  • I really need help on this please
    13·1 answer
  • Solve the system using subtitions {5x-y=5 <br> 5x3y=15
    14·1 answer
  • HURRY ILL GIVE BRAINLIEST!!
    6·2 answers
  • Can someone help me
    15·1 answer
  • A car travels 17 miles on one gallon of gas
    14·1 answer
  • -2x-4 = 12<br> --------<br> 3<br><br> btw thats a fraction and 3 is the denominator
    15·1 answer
  • PLS HELP ASAP
    9·1 answer
  • Can y’all help me with the answer please
    6·2 answers
  • Z &gt; 34. Which of the following statements is the best way to describe the value of z?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!