In triangle MNP, angle P is a right angle. If MP=24,NP=10 and MN=26,then which of the following is the value of cosN?

1) 5/13
2) 12/13
3) 12/5
4) 13/12

Step-by-step explanation:

we know that

In the right triangle MNP

----> by CAH (adjacent side divided by the hypotenuse)

substitute the given values

simplify

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

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