Question

Tan theta+cot theta =5.find for tan Square theta+cot square theta

Answer 1

tan@+cot@=5
squaring on both sides
(tan@+cot@)^2 = 25
tan^2@ + cot^2@+2tan@cot@=25
tan^2@+cot^2@+2tan@*1/tan@=25
tan^2@+cot^2@+2=25
tan^2@+cot^2@ =23