temperature in C on Feb 5 and 6 can be approximated using T(t)=20=5cos(pi/12(t-3)) where t is time in hours after noon on Feb 5 What were the min and max temps and what time did they occur. Could I get some help please

Question

temperature in C on Feb 5 and 6 can be approximated using T(t)=20=5cos(pi/12(t-3)) where t is time in hours after noon on Feb 5  What were the min and max temps and what time did they occur.  Could I get some help please

perl · Answer

the min of a cosine function occurs when the argument is pi

perl · Answer

The minimum occurs at T = 20 + 5cos( Pi ) 
 when pi/12 (t-3) = Pi

anonymous · Answer

so 1500 hours?

anonymous · Answer

help please :)

perl · Answer

Did you solve
pi/12 (t - 3) = pi 

(t-3) = 12 

t = 15