Question

Iota raised to power iota. How will we prove it. 

Proof that 1²+2²+...….n²=n(n+1)(2n+1)/6

if the product of the intercepts made by the straight line xtan alpha + ysec alpha =1 (0<= alph<=1pie/2) on the co-ordinate axes is equal sin

f{x}=x^2+x-2 is increasing function at what intervals?

Please please solve this problem 

Kindly solve q4, 5, 6, nd 8th

Answer for 105 and 106

prove that tan a+tan(60+a)+tan(120+a)=3 tan 3 a