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ICSE Class 9 Answered

ch distance formula 1) find the distance of the point (a cos θ, a sin θ) from the origin. 2) find the relation between x and y so that (x,y) is equidistant from (6,-1) and (2,3). 3) if (3,2),(-3,5) and (x,y) are collinear ,find the relation between x and y. 4) the ends of a diagonal of a square have the coordinates(a,1) and (-1,a).find the value of a for which the area of square is 50 sq units  5) find the points which  is/are at a distance of  √10 units from point (4,3) given that the ordinate  of the point is/ are twice the absissa.
Asked by v.venkateshalu | 09 Nov, 2020, 01:26: PM
answered-by-expert Expert Answer
 
Distance of the point (acos θ, asin θ) from origin(0, 0)

begin mathsize 16px style equals square root of open parentheses acosθ space minus space 0 close parentheses squared plus open parentheses asinθ space minus space 0 close parentheses squared end root equals square root of straight a squared cos squared straight theta plus straight a squared sin squared straight theta end root equals square root of straight a squared open parentheses sin squared straight theta plus cos squared straight theta close parentheses end root equals square root of straight a squared cross times 1 end root equals straight a space units end style

 
Note: Please ask only one question in one query.
Answered by Yasmeen Khan | 20 Jan, 2021, 05:29: PM

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