A round ball has a diameter of 10 inches. What is the approximate volume of the ball?
1 answer:
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Answer:
cosA = 0.6
Step-by-step explanation:
Using the Pythagorean identity
sin²A + cos²A = 1 ( subtract sin²A from both sides )
cos²A = 1 - sin²A ( take the square root of both sides )
cosA = ±
Since only the positive value is required , then
cosA =
=
=
= 0.6