If A=(-1,1), find A×A

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find the distance between the point( -3,7,2) and (2,4,-1)

if cosec a+ cot a=p then prove that cos a=p2-1/p2+1

Tan 120 ko tan(90 30) likh sakte hai???

Find the equation of the line which makes intercepts -3 and 2 on the x and y axis