Login Register

My account
Edit my Profile
Private messages
My favorites

Is cos² (2x)- sin² (2x)=0 an identity

Ask a Question
Questions
Unanswered
Tags
Ask a Question

Is cos² (2x)- sin² (2x)=0 an identity

asked Jan 24, 2023 128k views

0 votes

Is cos² (2x)- sin² (2x)=0 an identity

Mathematics
college

Sourav Prem asked

7.9k points

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

4 votes

I asked my brother and he says no

Hooman Bahreini answered Jan 31, 2023

by Hooman Bahreini

7.5k points

0 Comments

Please log in or register to add a comment.

← Prev Question Next Question →

Related questions

asked May 2, 2024 106k views

Given that cos² θ − sin² θ =3/4. What is the value of cos θ? a.√3/2 b.1/2 c.√7/2 d.√7/√8

Martin Plante asked May 2, 2024

by Martin Plante

7.7k points

Mathematics
high-school

1 answer

5 votes

106k views

asked Dec 24, 2024 113k views

Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos² (38°) - sin² (38°) = cos(A°), then A=. Degrees (b) If cos² (8x) - sin² (8x) = cos(B), then B=.

Mark Neal asked Dec 24, 2024

8.3k points

Mathematics
high-school

1 answer

1 vote

113k views

asked Aug 21, 2024 216k views

If cos a + cos² B+ cos² y =3, then sin² a+sin² B+ sin² y =? a. 3 b. 2 c. 1 d. 0

Anuj Rana asked Aug 21, 2024

8.0k points

Mathematics
high-school

1 answer

2 votes

216k views

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories

All categories
Mathematics (3.7m)
History (955k)
English (903k)
Biology (716k)
Chemistry (440k)
Physics (405k)
Social Studies (564k)
Advanced Placement (27.5k)
SAT (19.1k)
Geography (146k)
Health (283k)
Arts (107k)
Business (468k)
Computers & Tech (195k)
French (33.9k)
German (4.9k)
Spanish (174k)
Medicine (125k)
Law (53.4k)
Engineering (74.2k)

Other Questions

How do you can you solve this problem 37 + y = 87; y =

What is .725 as a fraction

How do you estimate of 4 5/8 X 1/3

QAmmunity.org
About Us

Twitter WhatsApp Facebook Reddit LinkedIn Email

Link Copied!

Search Qammunity.org