Arcsin is the inverse function of sine, it switches the sine function (reverses it)
cosec is the reciprocal of sine
Step-by-step explanation:
a) The total cost C is given by

b) If the total cost is $400, then we can solve for the number of hours as

Solving for n, we get

The octagon is the only shape you cannot make with a hollow cube and a plane.
Answer:
68 degrees
Step-by-step explanation:
You can tell by the picture that this is a right angle. All right angles add up to be 90 degrees. Since one of the angles is labeled, all you would do is subtract that from 90.
90-22=68
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