how to take log using log book without scientific calculators.?
Answers
Answer:
Step-by-step explanation:
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Answer:
Step-by-step explanation:
Most of the logs you can find out by remembering log2,log3,log5 and log7.
Use the properties: log(ab)=log(a) +log(b), so log(6)=log(3)+log(2)
also obviously, log(
a
b
)=b×
×
log(a) , so log(8)=log(23
2
3
)=3×
×
log(2)
As for antilogs, the basic property is y=log(x) => x=
e
y
OR 10
10
y
if you are using 10()
l
o
g
10
(
x
)
. These methods will not obviously work every time, but they do most of the time.
As a culmination of these methods and approximation, let’s try to find log(893)
log(893)=log(127.57×
×
7)≈
≈
log(7)+log(128)=log(7)+log(27
2
7
)=log(7)+7×
×
log(2)=0.845+7×
×
0.301=2.952 (actual value of log(893)=2.951)