Question

If tanA + cotA =5 ,find the value of tan ^2 A + cot^2A

Answer 1

Step-by-step explanation:

LHS=

tanA + cotA =5

(tanA +cotA)^2=25

tan^2A +cot^2A + 2.tanA.cotA =25

tan^2A +cot^2A + 2×1=25

tan^2A +cot^2A =23