formative task 1

we can show it better as follows:

you could have used the sine equation as well. Check the next equation. Remember the question asked you to find the cosine function.

i will add the following intervals so that we will see just the first 30 minutes on the graph. You do not have to do this step. I arrange the numbers of the x axis from the settings.

use y=100 for finding the times when the altitude is 100 meters

FINAL ANSWER