Find the approximate value of each trigonometric function. Given that sine = 0.519 where 0 < 0 < pi/2, find cos0. If necessary, round to 3 decimal places.
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Since 0 lies in Quadrant I, where cos0 > 0, cos0 is approximately ?

This is so hard and it’s for a test

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.