We are basically given most of what we need to calculate the height of the cannonball.
We use the formula h = –16t+ vt + s to find the height requested.
Let v = 160
Let s = 10
Let t = time in seconds
Was the value of t included? We need to know t to plug into our formula.
You know everything else except for t. Go back to your notes to search for t. Afterward, plug the value of t and everything else given above into the formula and calculate to find h.
Plug in r and s into your equation
You should get -1 for your final answer
Answer:3/4
Step-by-step explanation:
tan^2+1=sec^2
For angles
between 0º and 90º, we know
and
are both positive.
Then
falls between 0º and 45º, so both
and
are also positive.
Recall the double angle identities,


We know sine and cosine should be positive, so taking the square root of both sides gives us


Also recall the Pythagorean identity,

Then

and from here we get

