[" One or more than one option correct : "],[" The points "A(0,0),B(cos alpha,sin alpha)" and "C(cos B,sin B)" are the vertices "],[" of a right angled triangle,if : "]

The points A(0, 0), B(cos alpha, sin alpha) and C(cos beta, sin beta) are the vertices of a right angled triangle if :

The points A(0, 0), B(cos alpha, sin alpha) and C(cos beta, sin beta) are the vertices of a right angled triangle if :

If the points O (0,0), A(cos alpha, sin alpha), B(cos beta, sin beta) are the vertices of a right-angled triangle, then |sinfrac((alpha-beta))(2)| =

The points A(0,0),B(cos alpha,sin alpha) and C(cos beta,sin beta) are the vertices of a right- angled triangle if (a)sin((alpha-beta)/(2))=(1)/(sqrt(2))(b)cos((alpha-beta)/(2))=-(1)/(sqrt(2))(c)cos((alpha-beta)/(2))=(1)/(sqrt(2))(d)sin((alpha-beta)/(2))=-(1)/(sqrt(2))

If A(cos alpha,sin alpha),B(sin alpha,-cos alpha) and C(2,1) are the vertices of a triangle ABC . The locus of the centroid if alpha varies is

If ("Cos"alpha, "Sin"alpha,0),(cos beta, sin beta,0), (cos gamma, sin gamma, 0) are vertices of a triangle then circum radius R is

If A(cos alpha,sin alpha),B(sin alpha,cos alpha),C(1,2) are the vertices of Delta ABC, then as alpha veries,the locusof its centroid is

The sides of a triangle, sin alpha, cos alpha and sqrt(1+ sin alpha cos alpha) Then the greatest angle of the triangle is :

If (0,0) is orthocentre of triangle formed by A(cos alpha,sin alpha),B(cos beta,sin beta),C(cos gamma,sin gamma) then /_BAC=

If (0,0) is orthocentre of triangle formed by A(cos alpha,sin alpha),B(cos beta,sin beta),C(cos gamma,sin gamma) then /_BAC is