A
Abhijith
25 Oct 18

If [1+cosA / 1-cosA]^1/2 = x/y.Then value of tan A=??🤔

Replies to this post

A
Adithya

2xy(x^2-y^2) .,..... Think so

2
A
Aaditya

1+cos(A)=2cos^2(A/2)
1-cos(A)=2sin^2(A/2)
Putting these in above qstn.
We get,
{Cos^2(A/2)}/{Sin^2(A/2)}^1/2
=cotA/2=x/y
=> tan A/2=y/x
also tan A= (2tan A/2) / (1-tan^2A/2)
Finally we get ans.= 2xy/(x^2-y^2)

1
A
Abhijith

🤔🤔🤔

0