(iii)
Let ……….(i)
=
……….(ii)
Now, from eq. (i),
=
Here, and , then
=
Since, and is approximately equal to and respectively.
From eq. (ii), =
Therefore, approximately value of is 0.8 – 0.025 = 0.775.
(iv)
Let ……….(i)
=
……….(ii)
Now, from eq. (i),
=
Here, and ,
then
=
Since, and is approximately equal to and respectively.
From eq. (ii),
= = 0.0083
Therefore, approximately value of is 0.2 + 0.0083 = 0.2083.