Answer:
The answer is "It is not a valid sample because it is not a random sample of the population".
Step-by-step explanation:
I had this test and that was my answer, and it was correct.
I don't see how this is math but that would be hesitation wounds.
Hello,
(tg(x))'=1/cos²(x)
(arcsin(x))'=1/√(1-x²)
cos²(arcsin(x))=1-sin²(arcsin(x))=1-x²