If A + B + C = \pi/4 , then 4 cos A/2 cos B/2 cos C/2 - cos \pi/8 =

Correct Answer is : cos (π8−A) + cos (π8−B) + cos (π8−C)

cos (\pi/4-A) + cos (\pi/4-B) + cos (\pi/4-C)

cos (\pi/8-A) + cos (\pi/8-B) + cos (\pi/8-C)

sin (\pi/4-A) + sin (\pi/4-B) + sin (\pi/4-C)

sin (\pi/8-A) + sin (\pi/8-B) + sin (\pi/8-C)

TS EAMCET 7 May 2018 Shift 1 Solved Paper

Section: Mathematics

Question : 22 of 160

Marks: +1, -0

If A + B + C =

, then 4 cos

cos

- cos

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