[a sin^(2)x+b cos^(2)x=c,b sin^(2)y+a co...

[a sin^(2)x+b cos^(2)x=c,b sin^(2)y+a cos^(2)y=d],[" 2H-i "a tan x=b tan y,," dì "(a^(2))/(b^(2))=....." (थᅥง "],[a,b,c,d" (G-r छ.) "]

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