4t<span>²
= 4(3)</span><span>²
= 4 x 9
= 36</span>
Answer:
D. 6i
Step-by-step explanation:
That equal 1 because they are the same
15) factor out cos: cos(x)(sin(x)+1)=0
Now this is true when either cos(x)=0 (x=pi/2 and 3pi/2)
Or when sin(x)=-1 (x=3pi/2)
So it's solutions are pi/2 and 3pi/2
