Could someone explain

this is equivalent to the FUNDAMENTAL PYTHAGOREAN IDENTITY, sin2x + cos2x = 1 (also same if x= theta).

I don't understand how cos^2(theta)-1 = -sin^2(theta)

Kenneth S. answered • 09/05/17

Tutor

4.8 (62)

Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018

See tutors like this

this is equivalent to the FUNDAMENTAL PYTHAGOREAN IDENTITY, sin²x + cos²x = 1 (also same if x= theta).

Upvote 0 Downvote

Add comment

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.

I don't understand how cos^2(theta)-1 = -sin^2(theta)

1 Expert Answer

Still looking for help? Get the right answer, fast.

OR

RELATED TOPICS

RELATED QUESTIONS

Show that the limit does not exist?

lim(x is going to 0) (sinh(2x))/(cosh(3x))

Prove that lim(n->infinity) (1/n) = 0. Make a proof with definition of limit.

what is a limit problem that equals 30?

for x is not equal to 0, what is the limit of 1/h[ (1/ x + h) - (1/x) ] when h approaches 0 - Kathryn T. from Houston, TX

RECOMMENDED TUTORS

IXL

Rosetta Stone

Education.com

TPT

Vocabulary.com

ABCya

SpanishDictionary.com

Inglés.com

Emmersion

I don't understand how cos^2(theta)-1 = -sin^2(theta)

1 Expert Answer

Still looking for help? Get the right answer, fast.

OR

RELATED TOPICS

RELATED QUESTIONS

Show that the limit does not exist?

lim(x is going to 0) (sinh(2x))/(cosh(3x))

Prove that lim(n->infinity) (1/n) = 0. Make a proof with definition of limit.

what is a limit problem that equals 30?

for x is not equal to 0, what is the limit of 1/h[ (1/ x + h) - (1/x) ] when h approaches 0 - Kathryn T. from Houston, TX

RECOMMENDED TUTORS

find an online tutor