menu
Qammunity
Login
Register
My account
Edit my Profile
Private messages
My favorites
Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question
Cos3x=4cos^3x-3cosx prove
asked
Jan 3, 2019
158k
views
0
votes
Cos3x=4cos^3x-3cosx prove
Mathematics
high-school
Crowlix
asked
by
Crowlix
8.1k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
4
votes
Jacob Proffitt
answered
Jan 8, 2019
by
Jacob Proffitt
8.5k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Jun 13, 2020
71.0k
views
Which of the following cosine functions has a period of 3 π ? A. y = 3cosx B. y = cos3x C. y = cos2/3x D. y = 1/3cosx
Laurent Gosselin
asked
Jun 13, 2020
by
Laurent Gosselin
8.8k
points
Mathematics
middle-school
2
answers
2
votes
71.0k
views
asked
Sep 22, 2021
187k
views
cos3x-3cosx=cos2x+1 {Domain: 0<=x<=360} The solution is 90deg, 180deg, and 270deg, but what are the simplifying steps in between? I know all trig identities.
Martin Golpashin
asked
Sep 22, 2021
by
Martin Golpashin
8.3k
points
Mathematics
college
1
answer
3
votes
187k
views
asked
Mar 22, 2021
43.3k
views
Help me please!!! Help me understand why sin2x+cos3x. Equals = 2sinxcosx+4cos³x-3cosx Use the double identity
Mangusta
asked
Mar 22, 2021
by
Mangusta
7.9k
points
Mathematics
high-school
1
answer
4
votes
43.3k
views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
9.4m
questions
12.2m
answers
Other Questions
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement how thick must the cement be to cover field
Mr. Jacob is 55 years old and tony is 7 years old. in how many years will mr. Jacobs be 4 times as old as Tony
9/10 divided by (1/10 plus 2/5)
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qammunity