Answer:
Step-by-step explanation:
8. 21+7 = 28
9. 73-17 =56
Answer:
Part I: cot(15 degrees) = cot(45 - 30)
Part II: Evaluation is below
Step-by-step explanation:
<em>Everything is done in degrees</em>
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Two angles that differ by 15 degrees that is easy to evaluate is 30 degrees and 45 degrees. The cot(15 degrees) = cot(45 - 30) = 1/tan(45-30) = (1+tan45tan30)/(tan30 - tan45) = (1+ sqrt(3))/(sqrt(3) - 1)
We rationalize this by multiplying 1+ sqrt(3) in the top and bottom, getting:
(4 + 2sqrt(3))/2 = 2 + sqrt(3)
I hope this helps! :)
8 - 4:15 pm = 8 hours and 15 minutes , minus the hour break = 7 hours and 15 minutes . she earnt $64.38 for 7.25 hours work so 64.38 / 7.25 = 8.88 . she gets paid $8.88 an hour
Let's find the value of x
Since the sum of internal angles of a triangle is 180°
therefore,
