Question

For (a) use a calculator to evaluate to four significant digits. Use the answer in (a) to evaluate (b) and (c).

Answer 1

A\[\sin(7.3\pi)\]B\[\sin(20000000007.3\pi)\]C\[\cos(\frac{ \pi }{ 2 }-20000000007.3\pi)\]I got -.0890 for A, -.7400 for B, and .7400 for C.
Am I correct?

Answer 2

I get something else for b

Answer 3

How did you get that for B and C?

Answer 4

I did the first time too. I calculated it the first time as \[\sin(20000000007.3\pi)\]and punched it into my calculator and got -.8092, but then I got -.7400 when I calculated it like this \[\sin(2000000000)(-.8090)\]I don't know which is correct.

Answer 5

The second one I actually use the answer I got in (a), but on the first one I didn't

Answer 6

I don't see why you would multiply both A and B together.

Answer 7

I don't know how else i'm suppose to use the answer of (a) in (b) and (c). Do you?

Answer 8

Just compare answers I suppose.

Answer 9

If I just punch it into my calculator, then I get -.8092 for (b) and -.8091 for (c)