Question

$Tan^{2} A = 1 + 2 Tan^{2} B$
Then What Is the Value Of $\frac{Cos^{2}A }{Cos^{2} B}$

Answer is $\frac{1}{2}$

I need solution...

Answer 1

Answer:

Step-by-step explanation:

Correct option is

A

95

Given

57:x::51:85

⇒  

x

57

​

=  

85

51

​

 

⇒51x=(57×85)

⇒x=  

51

(57×85)

​

 

⇒x=  

51

4845

​

 

⇒x=95

Hence, Option (A) is the correct answer