Evaluate the following limits:
As we need to find
We can directly find the limiting value of a function by putting the value of the variable at which the limiting value is asked if it does not take any indeterminate form (0/0 or ∞/∞ or ∞-∞,1∞ .. etc.)
Let Z =
As it is taking indeterminate form.
∴ we need to take steps to remove this form so that we can get a finite value.
As, Z =
⇒ Z =
Taking log both sides-
⇒ log Z =
⇒ log Z =
{∵ log am = m log a}
Now it gives us a form that can be reduced to
Dividing numerator and denominator by tan2√x –
log Z =
using algebra of limits –
Let, tan2√x = y
As x→0+⇒ y→0+
∴ A =
Use the formula -
∴ A = 1
Now, B =
⇒ B =
Use the formula -
∴ B = 2
Hence,
log Z =
⇒ loge Z = 1/2
∴ Z = e1/2
Hence,