If \cos \alpha+4 \cos \beta+9 \cos \gamma=0 and \sin \alpha+4 \sin \beta+9 \sin \gamma=0, then 81 \cos (2 \gamma-2 \alpha)-16 \cos (2 \beta-2 \alpha)= [AP EAPCET 22 May 2024 Shift 2]

Correct Answer is : 1+8cos(β−α)

AP EAPCET 22 May 2024 Shift 2 Solved Paper

Section: Mathematics

Question : 9 of 160

Marks: +1, -0

If cos‌α+4‌cos‌β+9‌cos‌γ=0 and sin‌α+4sin‌β+9sin‌γ=0, then
81‌cos(2γ−2α)−16‌cos(2β−2α)=

[AP EAPCET 22 May 2024 Shift 2]

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