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
strojnjashka [21]
3 years ago
10

Plz answer will be marked BRAINLIEST

Mathematics
2 answers:
vova2212 [387]3 years ago
4 0

Answer:

a=90 degrees divide by 5

=18 degrees

2c+a=90

2c+18=90

2c=90-18

2c=72

divide each side by 2

c=36

therefore:

2c=72

b=4a+c

b=4(18)+36

b=72+36

b=108

Anastaziya [24]3 years ago
3 0
A=90 degrees divide by 5
=18 degrees
2c+a=90
2c+18=90
2c=90-18
2c=72
divide each side by 2
c=36
therefore:
2c=72

b=4a+c
b=4(18)+36
b=72+36
b=108
You might be interested in
Complete the identity.<br> 1) sec^4 x + sec^2 x tan^2 x - 2 tan^4 x = ?
Alecsey [184]

Answer:

See Explanation

Step-by-step explanation:

<em>Question like this are better answered if there are list of options; However, I'll simplify as far as the expression can be simplified</em>

Given

sec^4 x + sec^2 x tan^2 x - 2 tan^4 x

Required

Simplify

(sec^2 x)^2 + sec^2 x tan^2 x - 2 (tan^2 x)^2

Represent sec^2x with a

Represent tan^2x with b

The expression becomes

a^2 + ab- 2 b^2

Factorize

a^2 + 2ab -ab- 2 b^2

a(a + 2b) -b(a+ 2 b)

(a -b) (a+ 2 b)

Recall that

a = sec^2x

b = tan^2x

The expression (a -b) (a+ 2 b) becomes

(sec^2x -tan^2x) (sec^2x+ 2 tan^2x)

..............................................................................................................................

In trigonometry

sec^2x =1  +tan^2x

Subtract tan^2x from both sides

sec^2x - tan^2x =1  +tan^2x - tan^2x

sec^2x - tan^2x =1

..............................................................................................................................

Substitute 1 for sec^2x - tan^2x in (sec^2x -tan^2x) (sec^2x+ 2 tan^2x)

(1) (sec^2x+ 2 tan^2x)

Open Bracket

sec^2x+ 2 tan^2x ------------------This is an equivalence

(secx)^2+ 2 (tanx)^2

Solving further;

................................................................................................................................

In trigonometry

secx = \frac{1}{cosx}

tanx = \frac{sinx}{cosx}

Substitute the expressions for secx and tanx

................................................................................................................................

(secx)^2+ 2 (tanx)^2 becomes

(\frac{1}{cosx})^2+ 2 (\frac{sinx}{cosx})^2

Open bracket

\frac{1}{cos^2x}+ 2 (\frac{sin^2x}{cos^2x})

\frac{1}{cos^2x}+ \frac{2sin^2x}{cos^2x}

Add Fraction

\frac{1 + 2sin^2x}{cos^2x} ------------------------ This is another equivalence

................................................................................................................................

In trigonometry

sin^2x + cos^2x= 1

Make sin^2x the subject of formula

sin^2x= 1  - cos^2x

................................................................................................................................

Substitute the expressions for 1  - cos^2x for sin^2x

\frac{1 + 2(1  - cos^2x)}{cos^2x}

Open bracket

\frac{1 + 2  - 2cos^2x}{cos^2x}

\frac{3  - 2cos^2x}{cos^2x} ---------------------- This is another equivalence

8 0
3 years ago
2 pints = ____ cups<br><br> A<br> 2<br><br> B<br> 4<br><br> C<br> 6<br><br> D<br> 8
Luden [163]

Answer:b) 4 cups

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
1000000000+100000000000/42544*0
jolli1 [7]

Answer:

1,000,000,000

Step-by-step explanation:

5 0
3 years ago
Are the graphs of y= 1/3x-4 and y-2=-3(x-4) parallel, perpendicular, or neither
melamori03 [73]

Answer:

ghtrh

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
The population of a city is 578,992. The land area of the city is 67.2 mi².
Inessa05 [86]
Sorry man I don't know if im write but try 28.78
5 0
3 years ago
Read 2 more answers
Other questions:
  • The measure of an angle is 15 degrees what is the measure of its supplementary angle?
    6·2 answers
  • If m&lt;1 = 40 degrees, what is m&lt;5?<br><br> &lt;= angle sign
    7·1 answer
  • What is the answer to 4*3/5=
    15·1 answer
  • What is the coefficient of 10x+100
    13·2 answers
  • A rectangular pan has a length that is 4/3 the width. The total area of the pan is 432 in. 2. How much is the width of the cake
    13·1 answer
  • Answer Asap Will make Brainliest!
    6·1 answer
  • Can someone plzzzz helppp meeee!!!!!!
    9·1 answer
  • A flagpole stands perpendicular to the ground. It is supported by a 20-foot cable that runs from the top of the flagpole to the
    9·1 answer
  • Pls help me asap I give brainliest
    9·1 answer
  • Find the value of Y.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!