Question

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

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.