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
Crazy boy [7]
3 years ago
13

Prove tan3A= (cos(2A)-cos(4A))/ (sin(4A)- Sin(2A)) ...?

Mathematics
1 answer:
aivan3 [116]3 years ago
5 0
The solution to the problem is as follows:

<span>cos2A - cos4A = -2 sin(6A/2).sin(-2A/2) = +2 sin(3A).sinA
 
and
 
sin4A - sin2A = 2 cos(6A/2).sin(2A/2) = 2 cos(3A).sinA

Hence RHS = (cos(2A)-cos(4A))/ (sin(4A)- Sin(2A)) = sin 3A / cos 3A = tan 3A = LHS
</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
You might be interested in
Ms. Houston's fifth grade class is going to A museum the class raises $68 for the trip transportation to the museum cost $40The
damaskus [11]
68-40=28
28/4=7
therefore, 7 is your answer
(Hope it helps my friend ^_^)

8 0
3 years ago
Read 2 more answers
Simplify the fraction 20/41
melomori [17]

Answer:

20/41 (it can't be reduced or simplified)

Step-by-step explanation:

41 is a prime number hence cannot be divided by anything.

Therefore, 20/41 simplified is still 20/41 and in decimal format is 0.488(3 d.p)

8 0
3 years ago
Read 2 more answers
What do I plug into a calculator to find the value of 831 after a 12% increase?
Alexandra [31]

Answer:

plug in d 831×12 into the caculator

6 0
2 years ago
Read 2 more answers
The length of a rectangle is 3 times twice the width. The perimeter is 36. What are the side lengths?
Svetllana [295]

Answer & Explanation:

For this question, you need to figure out the length and the width because the area is directly related to them (A = l*w).

What we do know is that the perimeter is 36 inches. Since the perimeter is equal to P = 2l + 2w, we can say:

P = 36 = 2(3 + 2w) + 2(w), where the length l is 3 + 2w

Solve for w first, then solve for l. Use these values to find the area.

Pls, choose me as brainliest!

8 0
1 year ago
En un examen de admisión de 120 preguntas, cada respuesta correcta vale 2 puntos y por cada incorrecta se quita medio punto. Un
padilas [110]

Answer:

Respondió mal 64 preguntas.

Step-by-step explanation:

De acuerdo a la información proporcionada puedes plantear las siguientes ecuaciones:

x+y=120 (1)

2x-0,5y=80 (2)

x es el número de preguntas correctas

y es el numero de preguntas incorrectas

Primero debes despejar "x" en (1):

x=120-y (3)

Después, debes reemplazar (3) en (2):

2(120-y)-0,5y=80

240-2y-0,5y=80

240-80=2,5y

160=2,5y

y=160/2,5

y=64

Ahora puedes reemplazar el valor de "y" en (3) para encontrar el valor de "x":

x=120-y

x=120-64

x=56

De acuerdo a esto, la respuesta es que el postulante respondió mal 64 preguntas.

6 0
3 years ago
Other questions:
  • PLZ ANSWER I WILL GIVE BRAINLIEST AND 100 POINTS!!!!!!!!!!!1
    9·2 answers
  • A ladder is 9 feet 10 inches tall. How tall is it in inches?
    11·1 answer
  • NEED HELP PLEASE! WILL GIVE MEDAL:
    7·2 answers
  • What are all the powers of 3 in the range 3 through1000
    14·1 answer
  • Jenson is picking out what to wear to school. He has three clean T-shirts: one white, one red, and one orange. He also has two c
    12·1 answer
  • What is the rule of a function of the form f(t)= a sin (bt+c) +d whose graph appears to be identical to the given graph?
    15·2 answers
  • a rectangle has a length that is 6 inches longer than its width. if w represents, the width, write an expression, in terms of w,
    9·2 answers
  • The larger of two numbers is equal to three times the smaller.if twice the larger is added to three times the smaller, the sum i
    5·1 answer
  • I believe this is goodbye i hope i helped u guys.
    8·1 answer
  • What is the answer to (-15,12),(-9,12)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!