UPSC NDA II 2014 Mathematics Paper

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Question : 36 of 120

Marks: +1, -0

What is

cos‌7‌x−cos‌3‌x

sin‌7‌x−2‌sin‌5‌x+sin‌3‌x

equal to ?

[NDA II 2014]

tan x
cot x
tan 2x
cot 2x

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