(csc x-1)(csc x+1)=csc²x-1²=csc²x-1=(1/sin x)² -1=1/sin x² - sin²x/sin²x=
=(1-sin²x)/sin² x = cos² x/ sin² x = (cos x/sin x)²= (cot x)²
The answer is choice D because if you combine the like terms, you get 15-23i
i hope that helps!!!!
Answer:
-13n + 101
Step-by-step explanation:
88, 75, 62, 49. = -13 -13 -13 = -13n + 101 (as 88+13 = 101)
C -3/2
Just multiply the second equation by -3/2
this will make the y term = -3/4y
so adding will eliminate the y terms.
