NDA Math Trigonometric Ratios of Angles and Equations Part 2

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Question : 54 of 75
 
Marks: +1, -0
If sin‌x+sin‌y=cos‌y−cos‌x, where 0<y<x<
Ï€
2
then what is tan(
x−y
2
)
equal to?
[NDA-I 2020]
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