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
melisa1 [442]
3 years ago
14

The expression cos 42° in terms of sine

Mathematics
1 answer:
GalinKa [24]3 years ago
8 0

Answer:

\because \:  \cos \theta =  \sin \: (90 \degree -  \theta) \\  \\  \therefore \:  \cos \: 42 \degree =  \sin \: (90 \degree -  42 \degree) \\  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = \sin \: 48 \degree \\  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \orange{ \boxed{ \therefore \:  \cos \: 42 \degree =\sin \: 48 \degree}}

You might be interested in
Coach barron bought 66 pounds of ice cream for the end of the year little league social. there are 8 teams, each with 12 people.
frozen [14]
Each person gets about 9.75 ounces of ice cream 
4 0
3 years ago
Can you please help me?
Semmy [17]

Answer:

the answer of ur eternity is

Step-by-step explanation:

ur mom

5 0
3 years ago
Please help and explain part A B and C
Umnica [9.8K]
Part A you would just distribute your 3 to your X and your 5. After doing that you would get 3x+15+x=4x. Next you would combine like terms, meaning combine your x's together that is on the same side of your equal sign. So you would add 3x and x. When finished with that you would get, 4x+15=4x. You would then subtract your 4x on both sides of your equal sign. You then would get 15=0 which is no solution.

Part B you would distribute your 4 to your 1 and -x. After doing this your equation should then look like 4-4x=5x+8. Next you would try to get your like terms together. You would add 4x on both sides of your equal sign. Your equation should then look like 4=9x+8. Next you would subtract your 8 on both sides of the equal sign because your getting your terms together. Your equation should then look like, -4=9x. This answer would be one solution.

Part C you would combine your like terms, meaning add your 2x and x together to get your equation looking like, 3x+5=5+3x. You can tell just by looking at this equation it's going to be a infinite number of solutions. 

Hope this helps! (:
8 0
3 years ago
I have a few questions!<br> a) x−1.27=4.09<br> b) 2.3−y=2.301<br> c) t+3.04=14.3<br> d) 1.1+k=5.67
maks197457 [2]

Answer:

a.)  x = 5.36

b.)  y = - 0.001

c.)  t =  11.26

d.)  k =  4.57

Step-by-step explanation:

a) x−1.27=4.09

b) 2.3−y=2.301

c) t+3.04=14.3

d) 1.1+k=5.67

Solving. right?

a.)  x = 4.09 + 1.27 = 5.36

b.)  y = 2.3 - 2.301 = - 0.001

c.)  t = 14.3 - 3.04 =  11.26

d.)  k = 5.67 - 1.1  =  4.57

5 0
2 years ago
The hypotenuese of an isosceles right triangle is 13 inches. The midpoints of its sides are connected to form an inscribed trian
Georgia [21]

Answer:

The Sum of the areas of theses triangles is 169/3.

Step-by-step explanation:

Consider the provided information.

The hypotenuse of an isosceles right triangle is 13 inches.

Therefore,

x^2+x^2=169\\2x^2=169\\x=\frac{13}{\sqrt{2} }

Then the area of isosceles right triangle will be: A=\frac{1}{2} x^2

Therefore the area is: A=\frac{169}{4}

It is given that sum of the area of these triangles if this process is continued infinitely.

We can find the sum of the area using infinite geometric series formula.

S=\frac{a}{1-r}

Substitute a=\frac{169}{4} \ and\ r=\frac{1}{4} in above formula.

S=\frac{\frac{169}{4}}{1-\frac{1}{4}}

S=\frac{\frac{169}{4}}{\frac{3}{4}}

S=\frac{169}{3}

Hence, the Sum of the areas of theses triangles is 169/3.

7 0
2 years ago
Other questions:
  • ∆ABC ~ ∆WXY. What is the value of x? (show work)
    7·1 answer
  • Pizza house offers 3 different​ salads, 2 different kinds of​ pizza, and 4 different desserts. how many different​ three-course
    8·1 answer
  • Três crianças foram à lousa e cada uma escreveu uma fração.
    11·1 answer
  • Demarco wants to find the angle measures of this parallelogram. He knows that the first step is to find the value of x. Which of
    6·1 answer
  • What is the value of expressions ? 18-2×(4+3)
    12·2 answers
  • Subtract 1 1/2 from the product of 1 1/2 times 2 2/3
    11·1 answer
  • Use induction to prove: For every integer n &gt; 1, the number n5 - n is a multiple of 5.
    14·1 answer
  • Please help meeee!!!!
    10·1 answer
  • Ty so so much if you helped me :)
    11·1 answer
  • There are 12 servings in a box of cereal. Each day, Ryan eats 2 servings of cereal. What fraction of the full box of cereal has
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!