Test Index

NCERT Class XI Mathematics - Trigonometric Functions - Solutions

© examsnet.com
Question : 35
Total: 61
sinx−siny
cosx+cosy
 = tan (
x−y
2
)
Solution:  
We have, L.H.S.=
sinx−siny
cosx+cosy
=
2cos(
x+y
2
)sin(
x−y
2
)
2cos(
x+y
2
)cos(
x−y
2
)
 =
sin(
x−y
2
)
cos(
x−y
2
)
 = tan (
x−y
2
) = R.H.S.
© examsnet.com
Go to Question:
Prev Question
Next Question