Answer:
umm, a=3 I believe?
Step-by-step explanation:
4²=16, and 5²=25 so 25-16=9 and the square root of 9 is 3
If they both have the same signal than its positive if not its negative. I don't what you mean by zero though i'm in 6th grade
Step-by-step explanation:

Rewrite csc(x) in terms of sin

Multiply the numerator. Notice that the factors in the numerator are reciprocal so they will factor out to 1.

Notice that cotangent and tan are reciprocal so

Answer:
ik im late but the answer is -8
Step-by-step explanation:
-5+-3=-8