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Posted by **CJ** on Friday, January 14, 2011 at 11:00am.

y = 18.25 sin(pi/6 t - 2.09) + 61.15

where t is the time in months and January is t = 1.

What is the average temperature for the month of February?

How do I do this problem ?

Please Help

- Math/Trig -
**Reiny**, Friday, January 14, 2011 at 11:11amsince Feb ---> t = 2

sub that in, make sure your calculator is set to radians

y = 18.25 sin ((π/6)(2)-2.09) + 61.15

= 45.39

make sure to follow the order of operation.

- Math/Trig -
**CJ**, Friday, January 14, 2011 at 11:14amThankyou!

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