Question should be sin 20 cos 10 + cos 20 sin 10
remember sin (a+b) = sin a cos b + cos a sin b ?
sin 20 cos 10 + cos 20 sin 10
= sin (20+10)
= sin 30
= 1/2
M = - 1/2 should b the answer
The correct answer is x= -1. Hope this helps!!
Yes it is because none of the x are the same number making it a function.
