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
Gelneren [198K]
2 years ago
14

Prove that cos3A=sin2A​

Mathematics
2 answers:
melamori03 [73]2 years ago
4 0

Answer:

Step-by-step explanation:

Cos3A= Sin2A ........ (i)\\\\Cos3A= Cos (90-2A)\\\\3A= 90-2A\\\\5A= 90\\\\A= 18\\\\

<em>Now,</em>

<em>Putting the value of A to find the value,</em>

<em />From (i)\\Cos(3x18) = Sin (2x18)\\Cos54= Sin36\\0.5877= 0.5877 \\LHS=RHSProved .

Gekata [30.6K]2 years ago
4 0

Answer:

Cos3A= Sin2A ........ (i)

Cos3A= Cos (90-2A)

3A= 90-2A

5A= 90

A= 18

from (i)

Cos(3×18) = Sin (2×18)

Cos54= Sin36

0.5877= 0.5877 proved .

Step-by-step explanation:

You might be interested in
| 15x + 5y = 20<br> 1 - 3x = y + 6
Zina [86]

Answer:

There isn’t a solution to this when using substitution or elimination.

Step-by-step explanation:

4 0
3 years ago
Help plz.................
Furkat [3]

Answer:

anawer:D he most popoular

6 0
2 years ago
A couch that regularly costs 975 is on sale for 390 what is the percent markdown
nirvana33 [79]

85% will be correct i feel like

3 0
3 years ago
Amanda and her four sisters divided 1,021 stickers equally how many did each girl receive
Gemiola [76]
1021 / 5 = 204.20.....each girl got 204 stickers.....with a remainder of 1 sticker
7 0
3 years ago
Please help me with this. If you show your work I will give brainliest if there are 2 answers
AfilCa [17]
<h3>Answer:  22.5</h3>

Work Shown:

450 calories = 20 ounces

450/20 calories = 20/20 ounces ..... divide both sides by 20

22.5 calories = 1 ounce

This smoothie has 22.5 calories per ounce.

6 0
3 years ago
Other questions:
  • The distance d (in miles) you travel in a car is given by the two equations shown, where t is the time (in hours) and g is the n
    7·2 answers
  • What is ten times as much as .09
    6·1 answer
  • Under which condition does a country with a small GDP have a large per capita income?
    7·2 answers
  • What is the measure of <br> A, in degrees?
    5·1 answer
  • What is the value of +(-3) 0) (-3)​
    6·1 answer
  • A store donated 2 1/4 cases of crayons to a day care center. Each case holds 24 boxes of crayons; each box holds 8 crayons. How
    14·2 answers
  • Mary got 85% correct on her math test. Mary missed 6 questions. How many total questions were on her math final?
    6·2 answers
  • A bag has some purple marbles and
    14·2 answers
  • Help me pretty please
    8·1 answer
  • I need help on this.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!