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
notka56 [123]
2 years ago
6

In right triangle ABC, m B Em C. Let sin B = r and cos B = s.

Mathematics
1 answer:
tatyana61 [14]2 years ago
6 0

The expression that represents the value of sin C - cos C is s-r

From the triangle ABC, since sin B = r and cos B = s.=, hence;

  • Opposite side= r
  • Adjacent side = s
  • Hypotenuse = 1

If m<C is the reference angle, then;

Opposite side= s

Adjacent side = r

Hypotenuse = 1

Sin C = s and cos C = r

Hence the expression that represents the value of sin C - cos C is s-r

Learn more on trigonometry here: brainly.com/question/20519838

You might be interested in
7) Which statement about perpendicular lines is true?
agasfer [191]

Answer:

is the a. Perpendicular lines form 90° angles.

3 0
2 years ago
Read 2 more answers
Three friends arrange to meet at a park entrance, but each friend ends up at a different entrance, as shown in the diagram.
Sladkaya [172]

Answer:

A, B, & D

Step-by-step explanation:

Jaime is at the smallest angle from the two friends.

Pat is at an angle of 90° to Chris and Jaime.

If they meet at Pat’s entrance, then Chris will have walked a shorter distance than Jaime.

3 0
2 years ago
Read 2 more answers
Can someone help me with this in a scientific notation
Leviafan [203]

Answer:

3.762 x 10^-7

Step-by-step explanation:

Alright this has the same exact concept as other scientific notation problems.

First, multiply your first numbers: 4.18 x 9 = 37.62

Next, we add our powers together -4 +-4 = -8 (can also be read as -4 - 4 = -8)

We now have 37.62 x 10^-8

Wait! This isn't in scientific notation.

Taking a closer look at this we see 37.62 x 10^-8 can be adjusted by moving the decimal over to the left. Scientific notation must be in simplest form with only one number on the left of the decimal. This gives up 3.762.

Now we need to adjust our notation. Since we moved the decimal over one we are adding one more power to our problem.

Our current power of -8 is now adding a power due to moving the decimal place over one unit to the left. This is equivalent to saying -8 + 1 which equals -7. Now that we fixed our powers, we can put our equation back together for our final answer

3.762 x 10^-7

6 0
3 years ago
Please help me evaluate the expression 10a + 7 if a =1/5
sattari [20]

Answer:

9

Step-by-step explanation:

10a+7

<u>10(1/5)</u> + 7

<u>2+7</u>

9

6 0
2 years ago
A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B an
Nataly [62]

Answer:

The distance between the walls is 70 m.

Step-by-step explanation:

Given: A source of laser light is at point A on the ground between two parallel walls BE and CD . The walls are perpendicular to the ground that is

BE ⊥ ED and CD ⊥ ED

AB is a ray of light which strikes the wall on the left at point B which is 30 meters above the ground. that is BE = 30 m

AC is a ray of light which strikes the wall on the right at point C. The length of AC = 80 meters.

The ray AB makes an angle of 45 degrees with the ground that is m∠BAE = 45°

The ray AC makes an angle of 60 degrees with the ground that is m∠CAD = 60°

As shown is figure attached below.

WE have to find the distance between the walls that is Length of ED

Length of ED = EA + AD

Consider the Δ AEB,

Using trigonometric ratio,

\tan\theta=\frac{perpendicular}{base}

Here \theta=45^{\circ} , perpendicular = 30 m  and base we can find.

thus,

\tan 45^{\circ}=\frac{30}{EA}

We know \tan 45^{\circ}=1

thus, EA =  30 m

Consider the Δ AEB,

Using trigonometric ratio,

\cos\theta=\frac{base}{hypotenuse}

Here \theta=60^{\circ} , hypotenuse = 80 m  and base we can find.

thus, \cos 60^{\circ}=\frac{base}{80}

We know, \cos 60^{\circ}=\frac{1}{2}

thus, Base = 40 m

AD = 40 m

Thus, the distance between the walls that is the length of ED = 30 + 40 = 70 m

4 0
3 years ago
Other questions:
  • Which would most likely be graphed using a continuous graph? Check all that apply.
    13·2 answers
  • Classify each system. the system shown below is . x + 3y = 4 3x + 9y = 12 the system shown below is . 3x – 4y = 12 6x – 8y = 21
    14·2 answers
  • Is a rectangle a polygon?
    12·2 answers
  • Which expression shows the prime factorization of 36?
    15·1 answer
  • How many different outcomes are possible for seven people seated in chairs arranged in a line?
    8·1 answer
  • How do I solve this question?
    14·2 answers
  • Amelia has
    11·1 answer
  • Solve -2t + 5 ≥ -7.<br><br> t ≥ -6<br> t ≤ -6<br> t ≥ 6<br> t ≤ 6
    12·1 answer
  • A rectangular prism with a width of 7.4 cm, a length of 8 cm, and a height of 3.2 cm​
    6·1 answer
  • Find the mid point of the line segment.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!