+0  
 
0
290
2
avatar+389 

What is the value of tan(π+x)tan(π+x) ?

I came up with the second answer..... 

 Mar 4, 2018
 #1
avatar+94558 
+1

tan (pi + x)  =

 

tan x  +  tan pi

_____________   =

1  -  tan x tan pi

 

 

(2/5) + 0

__________     =

 1  -  (2/5)*0

 

 

2/5

 

 

cool cool cool

 Mar 4, 2018
edited by CPhill  Mar 4, 2018
 #2
avatar+15451 
+1

Sin (x ) and  sin (pi + x) have the same BUT negative values

cos (x ) and  cos (pi+x)  have the same values but NEGATIVE

 

so  tanx  =  sin x / cos x

      tan (x+pi) = -sinx / -cosx  = sinx/cos x  = 2/5

 Mar 4, 2018

19 Online Users

avatar
avatar
avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.