TS EAMCET 18-July-2022 Shift 2 Solved Paper

Section: Mathematics

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Question : 22 of 160

Marks: +1, -0

If cos‌x+cos‌y=p,sin‌x+sin‌y=q, then cos(‌

x−y

2

)=

±‌
√p2+q2
2
±‌
pq
2
±(‌
p+q
2
)
±‌
√p2+q2
4

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