# Trig Verbiage question

1. Aug 23, 2013

### majinkenji

Hello,

In a trig verbiage such as "if cos t = -8/17 and pi/2 <t <pi" could someone please provide an alternate way of interpreting "and pi/2 <1 <pi"? I don't understand what is trying to be said with this portion. Any alternate interpretations would be wonderful.

Best Wish,
mk

2. Aug 23, 2013

### Pythagorean

try drawing the expression $\frac{\pi}{2} < t$ graphically and reevaluating the problem.

3. Aug 23, 2013

### majinkenji

Hello Pythagorean,

Is it basically just identifying its position on a coordinate plane? i.e. Q2 in this case?

Regards,

mk

4. Aug 23, 2013

### ehild

Yes, it means that the angle t is in the second quadrant.

ehild

5. Aug 23, 2013

### Pythagorean

I would say confining the solution to Q2, but yes.

6. Aug 23, 2013

### majinkenji

Got it, thank you very much.

Regards,
mk