1. 1. Find the acute angle between the pair of lines represented by the following equations.
(i)x² - 7xy + 12y² = 0 0
(ii) y² - xy - 6x² = 0
(iii) (x cos a - y sin c)2 = (x²+ y²)sin²alpha
(iv) x² + 2xy cota - y² = 0
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sorry bro I don't know so sorry bro
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