- #1
sacwchiri
- 7
- 0
more trig...
Amm I've been at this problem for an hour already it loooked really easy but for some reason i can't reach the answer
(tan x + sec x)^2 = (1 + sin x)/(1 - sin x)
soo what went and tried was expand it and then exchage tan and sec..
(sin^2 x /cos^2 x )+ (2/cos x) + (1/ sin^2 x)
((sin^2)(sin^2) + (2(sin^2)(cos)) + cos^2)/((sin^2)(cos^2))
((sin^2)(sin^2 + 2cos - 1) + 1)/((sin^2)(1-sin^2))
(sin^2 + 2cos)/(1-sin^2)
and after i get there i njust don't know how to get to the (1 + sin x)/(1 - sin x)
any ideas??
Amm I've been at this problem for an hour already it loooked really easy but for some reason i can't reach the answer
(tan x + sec x)^2 = (1 + sin x)/(1 - sin x)
soo what went and tried was expand it and then exchage tan and sec..
(sin^2 x /cos^2 x )+ (2/cos x) + (1/ sin^2 x)
((sin^2)(sin^2) + (2(sin^2)(cos)) + cos^2)/((sin^2)(cos^2))
((sin^2)(sin^2 + 2cos - 1) + 1)/((sin^2)(1-sin^2))
(sin^2 + 2cos)/(1-sin^2)
and after i get there i njust don't know how to get to the (1 + sin x)/(1 - sin x)
any ideas??