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...
Accepted Solution
A:
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