In an isosceles triangle `A B C` if `A C=B C` and `A B^2=2A C^2` , then `/_C=` `30o` (b) `45o` (c) `90o` (d) `60o`

In an isosceles triangle ABC if AC=BC and AB^(2)=2AC^(2), then /_C=30o(b)450 (c) 90o(d)60o

sin2A=2sin A is true when A=0o(b)300 (c) 45o(d)60o

The angle of intersection of the curves x y=a^2 and x^2-y^2=2a^2 is zero 0o (b) 45o (c) 90o (d) 30o

In a quadrilateral A B C D , /_B=90^o , A D^2=A B^2+B C^2+C D^2 , prove that /_A C D=90^o

Two equal circles touch each other externally at C and A B is a common tangent to the circles. Then, /_A C B= 60o (b) 45o (c) 30o (d) 90o

Two equal circles touch each other externally at C and A B is a common tangent to the circles. Then, /_A C B= 60o (b) 45o (c) 30o (d) 90o

PQ is a tangent to a circle with centre O at the point P. If OPQ is an isosceles triangle, then /_OQP is equal to 30o (b) 45o(c)600 (d) 90o

Two circles touch each other externally at P . A B is a common tangent to the circle touching them at A and B . The value of /_A P B is 30o (b) 45o (c) 60o (d) 90o

P Q is a tangent drawn from a point P to a circle with centre O and Q O R is a diameter of the circle such that /_P O R=120o , then /_O P Q is 60o (b) 45o (c) 30o (d) 90o

A B C is an isosceles triangle in which /_C=90o . If A C=6c m , then A B= 6sqrt(2)c m (b) 6c m (c) 2sqrt(6)c m (d) 4sqrt(2)c m