Question

find x if (sec x-2) (5 tan x-5) = 0​

Answer 1

Step-by-step explanation:

sec2x−tan2x=1

(secx−tanx)(secx+tanx)=1

secx−tanx=15 (as secx+tanx=5)

Adding 2 equations:

secx+tanx=5

secx−tanx=15

2secx=5+15=265

secx=135