Question

how do i solve dis

Answer 1

Heres the file

Answer 2

@robtobey

Answer 3

well,first you need to know what is sec and cosec ... do you know?

Answer 4

i know

Answer 5

@PFEH.1999 pls help me out

Answer 6

@PFEH.1999 help me

Answer 7

well...9sec^2 A - 9tan^2 A = 9(sec^2 A - tan^2A) and as sec^2 A = 1/cos^2 A ok?

Answer 8

wht ellaborate

Answer 9

so you're confused?

well i just factor it as 9(sec^2 A - tan^2A) = 9sec^2 A - 9tan^2A) and you know that sec^2 A = 1/cos^2 A