Question

NO ONE WILL HELP ME!!! YOU CAN ANSWER ANY ONE YOU WANT!!!

1.)Select the function that is even.
f(x) = 3sin(x)
f(x) = 3tan(x)
f(x) = 3cos(x)
f(x) = 3cot(x)

2.)Eliminate the parameter, t, in the parametric equations, x = 2cost and y = 4sint. x2 + y2 = 4
x2 + y2 = 16
4x2 + y2 = 16
x2 + 2y2 = 16

3.)Select the function that is odd.
f(x) = 2sin(x)
f(x) = 2sin(x) + 2cos(x)
f(x) = 2cos2(x)
f(x) = 2sin2(x)

4.)Theta is an angle in standard position with T(-20, -21) on its terminal ray.
Find sin Theta.

I also have to answer cos theta, tan theta, etc...

Answer 1

Not sure what "even" "odd' mean in this context, but I can answer number 4
the terminal point T on a circle is at (-20, -21), x=-20, y=-21,
so r=√(x²+y²)=√(400+441)=29
sinФ=y/r=-21/29
cosФ=x/r=-20/29
tanФ=y/x=21/20
cotФ=x/y=20/21
cscФ=1/sinФ=-29/21
secФ=1/cos=-29/20

Answer 2

Answer:

3cos(x) is even.

Step-by-step explanation: