i managed to get all the way down to getting x= 105.7 and 372.3

But why would you take off 360 at the end to get the answer 12.3? i just don't get it, is there a rule or am i just being stupid?

please help!

## 2004 paper 2 Q6b

### babeasc

Posted 13 May 2007 - 04:35 PM

You need to take off the 360 because it asks for values of x between 0 and 90.

Since the answers you get are above that range, then the values of x wanted in the answer must occur in the previous cycle.

since 105.7 - 360 is not between 0 and 90 (-254.3), it can be discounted.

Final answer = 372.3 - 360 = 12.3 [only answer that lies withing range]

Since the answers you get are above that range, then the values of x wanted in the answer must occur in the previous cycle.

since 105.7 - 360 is not between 0 and 90 (-254.3), it can be discounted.

Final answer = 372.3 - 360 = 12.3 [only answer that lies withing range]