Question

if tanA + Cot A = 3 then tan^3 A + cot^3 A =?

Answer 1

ok !! so do u know what is tan^3 A + cot^3 A ?

Answer 2

hint:

\[\tan^3 A + \cot^3 A = (\tan A + \cot A)(\tan^2 A - \tan A \cot A + \cot^3 A)\]

according to sum of cubes

Answer 3

\[\huge{a^3+b^3=(a+b)(a^2-ab+b^2)}\] This is the main formula that is applied by lgba to get to that formula

Answer 4

Can you do that now ?