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Mandarinka [93]
3 years ago
5

What is an obtuse angle?

Mathematics
1 answer:
natali 33 [55]3 years ago
5 0
An obtuse angle is an angle that is in between 90 degrees and 180 degrees. It looks like this 

You might be interested in
Trigonometry <br> Find x<br> 8.3 <br> 34 degrees
Diano4ka-milaya [45]

Answer:

Step-by-step explanation:

In Triangle

A

B

C

with the right angle at

C

, let

a

,

b

, and

c

be the opposite, the adjacent, and the hypotenuse of

∠

A

. Then, we have

sin

A

=

a

c

⇒

m

∠

A

=

sin

−

1

(

a

c

)

sin

B

=

b

c

⇒

m

∠

B

=

sin

−

1

(

b

c

)

I hope that this was helpful.

Wataru ·  1 · Oct 29 2014

How do you find all the missing angles, if you know one of the acute angles of a right triangle?

The sum of the measures of all the angles in a triangle is always equal to

180

o

.

In a right triangle, however, one of the angles is already known: the right angle, or the

90

o

angle.

Let the other two angles be

x

and

y

(which will be acute).

Applying these conditions, we can say that,

x

+

y

+

90

o

=

180

o

x

+

y

=

180

o

−

90

o

x

+

y

=

90

o

That is, the sum of the two acute angles in a right triangle is equal to

90

o

.

If we know one of these angles, we can easily substitute that value and find the missing one.

For example, if one of the angles in a right triangle is

25

o

, the other acute angle is given by:

25

o

+

y

=

90

o

y

=

90

o

−

25

o

y

=

65

o

Tanish J. ·  1 · Nov 26 2014

How do you know what trigonometric function to use to solve right triangles?

Right triangles are a special case of triangles. You always know at least one angle, the right angle, and depending on what else you know, you can solve the rest of the triangle with fairly simple formulas.

http://etc.usf.edu/clipart/36500/36521/tri11_36521.htm

If you know any one side and one angle, or any two sides, you can use the pneumonic soh-cah-toa to remember which trig function to use to solve for others.

s

−

i

n

(

θ

)

=

 

o

−

pposite

/

 

h

−

ypotenuse

c

−

o

s

(

θ

)

=

a

−

djacent

/

h

−

ypotenuse

t

−

a

n

(

θ

)

=

o

−

pposite

/

a

−

djacent

Opposite refers to the side which is not part of the angle, adjacent refers to the side that is part of the angle, and the hypotenuse is the side opposite the right angle, which is

C

in the image above.

For example,lets say you know the length of

a

and the value of angle

A

in the above triangle. Using the cosine function you can solve for

c

, the hypotenuse.

cos

(

A

)

=

a

c

Which rearranges to;

c

=

a

cos

(

A

)

If you know the length of both sides

a

and

b

, you can solve for the tangent of either angle

A

or

B

.

tan

(

A

)

=

a

b

Then you take the inverse tangent,

tan

−

1

to find the value of

A

.

Zack M. ·  4 · Dec 7 2014

What are inverse trigonometric functions and when do you use it?

Inverse trigonometric functions are useful in finding angles.

Example

If

cos

θ

=

1

√

2

, then find the angle

θ

.

By taking the inverse cosine of both sides of the equation,

⇒

cos

−

1

(

cos

θ

)

=

cos

−

1

(

1

√

2

)

since cosine and its inverse cancel out each other,

⇒

θ

=

cos

−

1

(

1

√

2

)

=

π

4

I hope that this was helpful.

Wataru ·  1 · Nov 2 2014

What is Solving Right Triangles?

Solving a right triangle means finding missing measures of sides and angles from given measures of sides and angles.

I hope that this was helpful.

Wataru ·  3 · Nov 6 2014

5 0
2 years ago
A student solved z + (-0.72) = -2.5 for z using the
N76 [4]

Answer:

  • Mistake in step1

Step-by-step explanation:

<u>Given</u>

  • z + (-0.72) = -2.5

<u>Solving in steps</u>

  • 1. ⇒ z + (-0.72) - (-0.72) = -2.5 - (-0.72)
  • 2. ⇒ z = - (2.5 - 0.72)
  • 3. ⇒ z = - 1.78

The student's mistake was adding (-0.72) instead of - (-0.72) or 0.72

5 0
3 years ago
Read 2 more answers
This is a practice asaigment before the real assignment plz help​
Annette [7]

Answer:

1)a+$5.92=$12.29

a= $12.29-$5.92

a=$6.37

2) 42/j = 6

6j=42

j=42/6

j=7

3) j+8=72 —> 9+8=72–>17=72 False

m x 3= 27 —> 9x3=27 —> 27=27 True

b+4=13 —> 9+4=13 —> 13=13 True

p-5=4 —> 9-5=4 —> 4=4 True

q/3 = 27 —> 9/3 =27 —> 3=27 False

4) $15.32+ C= $29.00

For soccer ball: C= $12.87

$15.32+ C= $29.00 —> $15.32+ $12.87 = $29.00 —> $28.19

For baseball cap: C=$8.39

$15.32+ C= $29.00 —> $15.32+ $8.39 = $29.00 —>$23.71

For a set of shin guard: C=$14.98

$15.32+ C= $29.00 —> $15.32+ $14.98 = $29.00 —>$30.3

For water bottle: C=$5.93

$15.32+ C= $29.00 —> $15.32+ 5.93 = $29.00 —>$21.25

Because annabetg can spend only $29 at the store, the most expensive item she can buy with the t-shirt is the soccer ball which cost $12.87

5) 6x=12–> x=12/6 —> x=2 False

5+x=11 —> x=11-5 —> x=6 True

x/2=3 —> x= 2x3 —> x=6 True

17-x=11 —> -x=11-17 —> -x=-6 —> x=6 True

Note: Review part 4 please or ask someone to resolve it to make sure it is correct

3 0
3 years ago
Circle S is shown. Line segment R T is a diameter. The length of S T is 4. Sector R S T is shaded. The measure of central angle
ad-work [718]

Answer: 8π (Option B)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Pls help! will give brainliest
frozen [14]
1= 4
2= I THINK c+3
3=18
8 0
3 years ago
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