cÖgvb Ki †h 𝑠𝑖𝑛2(𝜃 + 𝛼) + 𝑠𝑖𝑛2𝛼 + 𝑠𝑖𝑛2(𝜃 − 𝛼) =3 2 2| ∆𝐴𝐵𝐶 = 12 eM© GKK| A BC = 6 ; 𝐴𝐶𝐵 = 75.960 B D C K

welq t MwYZ cÖ_g cÎ (mij‡iLv) mgq-1 N›Uv

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1| K. 𝑐𝑜𝑠𝜑 = ¹

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9

L. †`LvI †h 𝑐𝑜𝑠𝑐𝑒𝐶 − √3𝑠𝑒𝑐𝐶 = 4

M. cÖgvb Ki †h 𝑠𝑖𝑛²(𝜃 + 𝛼) + 𝑠𝑖𝑛²𝛼 + 𝑠𝑖𝑛²(𝜃 − 𝛼) =³

2

2|

∆𝐴𝐵𝐶 = 12 eM© GKK| A BC = 6 ; 𝐴𝐶𝐵 = 75.96⁰

B D C

K. 𝑠𝑖𝑛36⁰+ 𝑐𝑜𝑠36⁰ Gi gvb wbY©q Ki|

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‡gv:Ievq`yi ingvb cÖfvlK,MwYZ

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