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সমাধান করঃ $1 + s i n 2 ϕ + s i n 2 θ = c o s (2 ϕ + 2 θ) [0 \leq ϕ, θ \leq 90^{\circ}]$

Created: 1 year ago | Updated: 1 year ago

Updated: 1 year ago

1 year ago

শিক্ষাবর্ষঃ ২০০৫-২০০৬ উচ্চতর গণিত

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