The function f(t) = 7 cos(pi over 4t) + 12 represents the tide in Light Sea. It has a maximum of 19 feet when time (t) is 0 and a minimum of 5 feet. The sea repeats this cycle every 8 hours
To find the height of the tide after 2 hours, we plug in 2 for t and find out f(2)
We know that cos (pi/2) is 0
So f(2)= 12
After two hours, the height of the tide is 12 feet
Divide them and you're answer will come out
Step-by-step explanation:
We need to solve 5x+10=25 ....(1)
Step 1.
Subtract 10 to both sides of the above equation.
5x+10-10=25-10
5x=15
Step 2,
Divide each side by 5.
If we want to check whether it is correct or not, step are as follows :
Put x = 3 in equation (1)
5(3)+10=15+10
=25
It means that the above steps are correct.
Sec x is equal to 1/cosx, cot x is equal to cosx/sinx. cos x cancels, and you are left with 1/sinx. this is equal to cscx. Cosecant is : hypotenuse / opposite, so the answer is **D**
Substitute x for 2
5(2)^5-3(2)^4-17(2)^3-4(2)^2+10(2)+21
do the exponents
5(32)-3(16)-17(8)-4(4)+10(2)+21
simplify
160-48-136-16+20+21
1
f(2)=1
