Question

tanA + secA = x, find tanA​

Answer 1

Step-by-step explanation:

tanA + secA = x .....(1)

We know that ,

sec^2A - tan^2A =1

→(secA+ tanA)(secA-tanA)= 1.

→secA - tanA = 1/x. ...(2) {using(1)}

Subtracting (1) by (2), we get

-2tanA = 1/x -x

→2tanA = x-1/x

→tanA = (x^2-1)/2x