Question

Question #d9f99

Answer 1

`sin(-270^circ) = 1` and `sin(360^circ) = 0`

Explanation:

All points on the Unit Circle are of the form `(cos(theta),sin(theta))`.

`360^circ` corresponds to the point on the Unit Circle that's on the positive `x`-axis. That point is `(1,0)`. From this we know that `sin(360^circ) = 0`.

`-270^circ` is coterminal to `90^circ`. The point on the Unit Circle that corresponds to `90^circ` is `(0,1)`. From this we know that `sin(-270^circ) = 1`