NDA Math Trigonometric Ratios of Angles and Equations Part 2

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Question : 24 of 75
 
Marks: +1, -0
Let sin‌x+sin‌y=cos‌x+cos‌y for all x,y∈ℝ. What is tan(‌
x
2
+‌
y
2
)
equal to?
[NDA-II 2021]
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