1) Explain the difference between an equation and an identity.

2) How can you use the graphing capability to verify that two equations are identities?

3) What determines whether to use + or - in the half angle formula for sine and cosine?

4) Where does the Pythagorean Identity come from?

5) Can the Double-Angle formula be used to find sin 22.5?

Question

Everett

Mathematics

23 March, 16:52

1) Explain the difference between an equation and an identity.

2) How can you use the graphing capability to verify that two equations are identities?

3) What determines whether to use + or - in the half angle formula for sine and cosine?

4) Where does the Pythagorean Identity come from?

5) Can the Double-Angle formula be used to find sin 22.5?

+1

Answers (1)

Know the Answer?

Frost · Answer 1

1) An equation is where there can only be certain value or values in it. Identity, however, is where any value can be correct.

2) Don't know how.

3) Sine: + for first and second quadrants and vice versa.

Cosine: + for first and fourth quadrants and vice versa.

4) Don't know where.

5) Pretty sure no.