Find the value of tan x, if sec x + tanx = $\sqrt{3}$ and x lies between 0o and 90o.
Answer & explanation
Correct answer: option 4
We are given that ,
sec x + tan x = \(\sqrt {3 }\) ----(1)
{ using , sec² - tan²x = 1 so, secx - tanx = \(\frac{1}{sec x + tan x}\) }
secx - tanx = \(\frac{1}{ √3 }\) ----(2)
On adding equation 1 and 2.
2 secx = \(\sqrt {3 }\) + \(\frac{1}{ √3 }\)
2 secx = \(\frac{4}{ √3 }\)
secx = \(\frac{2}{ √3 }\)
{ we know, sec 30º = \(\frac{2}{ √3 }\) }
So, x = 30º
Now,
tanx
= tan 30º
= \(\frac{1}{ √3 }\)