1) Find the value of `(12)^2`

Find the value of i^(12)+i^(13)+i^(14)+i^(15)

The mean of 18,24,15, 2x+1 and 12 is 21. Find the value of x.

Find the value of 11^2+12^2+13^2++20^2dot

Find the values of (1)/(12!) + (1)/(10! 2!) + (1)/(8!4!) + …+ (1)/(12!)

Given a triangle ABC with AB= 2 and AC=1 . Internal bisector of angleBAC intersects BC at D. If AD = BD and Delta is the area of triangle ABC, then find the value of 12Delta^2 .

If a+b=7 and ab=12 find the value of a^(2)-ab+b^(2) .

If a+b=7 and a b=12 , find the value of (a^2-a b+b^2)

If a+b=7 and a b=12 , find the value of (a^2-a b+b^2)

Find the value of (cos^(2)66^(@)-sin^(2)6^(@))(cos^(2)48^(@)-sin^(2)12^(@)) .

If tantheta=(12)/5 , find the value of (1+sintheta)/(1-sintheta)