Answer:
EF = ~3.8
Step-by-step explanation:
Apply the sine theorem:
EF/sinD = DE/sinF
=> EF = DE*(sinD/sinF)
= 3*(sin75/sin50)
=3.78 = ~3.8
Hope this helps!
Explanation:
To do long division, follow the method pattern "DMS down".
D for divide.
M for multiply.
S for subtract.
Down is to bring down.
Use an example:
52 ÷ 2?
Divide 2 by the first digit of 52.
2 Whenever you divide, put the answer at the top.
2∫52
Multiply answer by number you are dividing by.
2
2∫52
4 When not dividing, put the work under the question.
Subtract.
2
2∫52
<u>4</u><u> </u>
1
Bring down the next digit.
2
2∫52
<u>4 </u>
12
Divide into the new difference 12.
26
2∫52
<u>4 </u>
12
Multiply the new digit.
26
2∫52
<u>4 </u>
12
12
Subtract.
26
2∫52
<u>4 </u>
12
<u>12</u><u> </u>
0 You stop when you get to 0. If you ran out of digits to bring down, write this as a remainder.
Answer:
<em><u>y = d + a · cos(bx - c) ⇒ y = -4cos(4/3x)</u></em>
Amplitude = |a| = |-4| = 4
Period = 
63 is what 5 tens and 13 ones equal
