Find the solution of the following system of equations by graphing y=-2x-1 y=-x-1
2 answers:
You might be interested in
Answer:
Step-by-step explanation:
In each case, draw the right triangle which produces the inverse trig value. That is, label the two sides as needed, and calculate the third side.
It should be clear that
sin(2α) = 2 sinα cosα
So,
See what you can do with the others.