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GAURAV KUMAR

· started a discussion

· 1 Months ago

shortcut (Question: 209669.0 )

put x=y=0

Question:
If sin x + sin y = a and cos x + cos y =  b, find the value of tan \(\cfrac{x + y}{2}\) . 
Options:
A) \(\cfrac{a}{b}\)
B) \(\cfrac{b}{a}\)
C) \(\cfrac{4}{a^2 + b^2}\)
D) \(\cfrac{4}{a^2 - b^2}\)
Solution:
Ans: (a)


Raghunatha Reddy Maraka

· commented

· 1 Months ago

then What about Option B....
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