what value of theta satisfies the equation sin(3theta+5)=cos(4theta+1)?
I have assueed that theta is in radians.
You can see the graph that I have drawn. Each root - where it crosses the x (theta) axis - is a soution to this equation,
so for any interval of 2pi there will be 8 different answers
That is for any interval $$a\le \theta \le a+2\pi$$ there will be 8 solutions to this equation.
https://www.desmos.com/calculator/campy4wccp
If you would like me to discuss this further I can.
Another mathematician may also like to comment.
No I did not know that. How could I know that when you did not say that?
Anyway.
Here is the same equation in degrees
https://www.desmos.com/calculator/039twi8dlz
You can see the graph that I have drawn. Each root - where it crosses the x (theta) axis - is a soution to this equation,
so for any interval of 360° there will be 8 different answers
That is for any interval $$a\le \theta \le a+360$$ there will be 8 solutions to this equation.