Like terms are 2m,3m. The coefficients are m I think.
Answer:
-90 , 30
Step-by-step explanation:
sina = cos(2a)
= 1 - 2(sina)^2
2(sina)^2 + sina -- 1 = 0
( sina + 1 )( 2sina - 1 ) = 0
sina = -1 or sina = 1/2
=> a = -90 degrees or => a = 30 degrees
I'm assuming you're trying to solve for r.
First divide a to both sides
Now you have

= a - r
Subtract a to both sides.
And then divide by -1 to both sides.
Now your equation is -

+ a = r
Answer:
A. y = -3x
Step-by-step explanation:
Try it. When you substitute the x and y values, you get -3 = -3x1, which is correct.
Answer:
A and E, The first and the last