Question

Solve the equation sin(2t) + cost= ¼ on the interval [0, 2π]. Express answer(s) to three decimal places

Answer 1

replace sin(2t) with 2sin(t)cos(t)

Answer 2

Okay, thank you.

Answer 3

When I graph y=2sin(t)cos(t)+ cos(t), it comes out as a straight line.

Answer 4

It is not a straight line. Did you use a graphing calculator or what?

Answer 5

I used a graphing calculator.

Answer 6

You probably need to expand your range of values. Try -6 to 6 for the x axis and -2 to 2 for the y axis

Answer 7

It is still showing it as a straight line.

Answer 8

This is what it really looks like:
https://www.wolframalpha.com/input/?i=y%3D2sin%28t%29cos%28t%29%2B+cos%28t%29