In January, the average temperature t hours after midnight in Mumbai, India, is given byT(t)=24.5−5.5sin(242π(t+1)).What is the coldest time of day in Mumbai? Give an exact answer.□ hours after midnight
Q. In January, the average temperature t hours after midnight in Mumbai, India, is given byT(t)=24.5−5.5sin(242π(t+1)).What is the coldest time of day in Mumbai? Give an exact answer.□ hours after midnight
Determine Minimum Temperature: To find the coldest time of day, we need to determine when the temperature function T(t) is at its minimum. The temperature function is given by:T(t)=24.5−5.5sin(242π(t+1)).The minimum temperature occurs when the sine function reaches its minimum value, which is −1.
Set Sine Function: Since the sine function varies between −1 and 1, we set the sine function to −1 to find the time when the temperature is at its minimum:−5.5sin(242π(t+1))=−5.5×(−1).This simplifies to:−5.5sin(242π(t+1))=5.5.
Solve for t: Now we need to solve for t when sin(242π(t+1))=−1. The general solution for sin(θ)=−1 is θ=23π+2kπ, where k is an integer.So we have:242π(t+1)=23π+2kπ.We will solve for t to find the specific time after midnight.
Multiply and Divide: First, we multiply both sides by 24 to get rid of the denominator:2π(t+1)=36π+48kπ.Next, we divide both sides by 2π:t+1=18+24k.
Find Specific Time: Now we subtract 1 from both sides to solve for t:t=17+24k.Since we are looking for the time within the first 24-hour period after midnight, we take k=0:t=17 hours after midnight.
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