Question

find the distance of a point A( x sin, x cos) from the origin ​

Answer 1

Answer:

Distance between (sinx,cosx) and (cosx,−sinx) is

r=

(sinx−cox)

2

+(cosx−(−sinx)

2

)

=>r=

(sin

2

x+cos

2

x−2sinxcosx)+(cox

2

x+sin

2

x−2sinxcosx)

=>r=

1+1

=>r=

2

Answer 2

it will solve with distance formula of ch 7

√(x2-x1)²+(y2-y1)²

hope.it help you