Step 1: Convert , which is in radians into degrees. To convert it multiply by
900/12
75
Step 2: 75 degrees isn't on the unit circle but 45 degrees and 30 degrees is. Since 45 + 30 = 75 you can use the cosine of 45 and 30 to find the exact value
cos45 =
cos30 =
Step 3: Add the cos45 and cos30 to get cos5pi/12
Hope this helped!
1/7 is the answer. 4/28 = 1/7 but in the lowest term
88 words 1 min
_______ _______
1 min 60 sec
88 × 1≈88 88 44
1 × 60≈60 ______ <---- simplify (÷by 2) _____ <---- simply again (÷by 2)
60 30
22
_____ divide both numbers (22÷15) ≈ 1.46666667 ( round to the
15 nearest hundredth: 1.467
1.467 words per second
i think ;)
The variable represents something that is unknown. If I want to know what to subtract from 13 to get 10, I would say 13-X=10
In this problem the Variable is X, but you can use any letter or symbol, I would not use "S", "O", or "l" to represent a variable, because they can look like 5, 0, and 1.
2115000
x*10= 42300
x= 4230
x*500
4230*500= 2115000
Hope this helps