Question

If tan x = - 1/√5

& x lies in the 4th quadrant ,the the value of

cos x is​

Answer 1

Answer:image below

Step-by-step explanation:Hope it helps

Answer 2

Answer:

tanx=-1/5

tan^2x=(-1/5)^2

Or, tan^2x=1/25

Or, sec^2x-1=1/25

Or, sec^2x=1/25 +1

Or,sec^2x=(1+25)/25

Or, sec^2x=26/25

Or, 1/cos^2x=26/25

Or, cos^2x=25/26

Or, cosx=√(25/26)

Or, cosx=+-5/√26

Step-by-step explanation:

hope it helps you

as such i am too

in 11th pcm