Register

Convert this identity to one using sine term(s) only. 1-2cos(r)^2

Convert this identity to one using sine term(s) only. 1-2cos(r)^2
194k views
3 votes
Convert this identity to one using sine term(s) only.
1-2cos(r)^2

User James Casia
by
7.9k points

1 Answer

4 votes
Pythagorean identity:
sin²+cos²=1
Then cos²=1-sin²
Substitute:
1-2cos²
1-2(1-sin²)
1-2+2sin²
2sin²-1
User MrBliz
by
8.5k points
← Prev Question Next Question →

Related questions

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

Categories

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
Link Copied!