Question

secA=3x and tanA= 3/x , then the value of 9(x^2-1/x^2) is.
how to solve this question.

ans of this question is - 1.​

Answer 1

Answer:

9(x²-1/x²)=1

Step-by-step explanation:

sec A=3x             --------(1)

tan A=3/x            ---------(2)

so,

   sec²A-tan²A=1

   (3x)²-(3/x)²=1            {substituting (1)  and (2)}

   9x²-9/x²=1

    9(x²-1/x²)=1

   hence proved

i hope you understood it