please solve this question
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Hi ,
tan 60° = √3 ----( 1 )
It is given that ,
( 1 - tan² 60° )/(1 + tan² 60° ) = cosx
[ 1 - ( √3 )² ]/[ 1 + ( √3 )² ] = cosx
( 1 - 3 )/ ( 1 + 3 ) = cosx
-2/4 = cosx
-1/2 = cosx
cos 120 = cos x
Therefore ,
120° = x
x = 120°
I hope this helps you.
: )
tan 60° = √3 ----( 1 )
It is given that ,
( 1 - tan² 60° )/(1 + tan² 60° ) = cosx
[ 1 - ( √3 )² ]/[ 1 + ( √3 )² ] = cosx
( 1 - 3 )/ ( 1 + 3 ) = cosx
-2/4 = cosx
-1/2 = cosx
cos 120 = cos x
Therefore ,
120° = x
x = 120°
I hope this helps you.
: )
Urvish19:
thank you sir but the ans is 120 i too got the ans as 60
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