`sin2A=2sinA` is true when `A=` `0o` (b) `30o` (c) `45o` (d) `60o`

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

sin2A=2sinA is true when A= (a) 0^@ (b) 30^@ (c) 45^@ (d) 60^@

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

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

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

In Fig.10.96 ,if TP and TQ are tangents drawn from an external points T to a circle with centre O such that /_TQP=60o ,then /_OPQ=( FIGURE) 25o (b) 30o (c) 40o (d) 60o

In Fig. 10.96, if T P and T Q are tangents drawn from an external points T to a circle with centre O such that /_T Q P=60o , then /_O P Q= (FIGURE) 25o (b) 30o (c) 40o (d) 60o

If PT is tangent drawn from a point P to a circle touching it at T and O is the centre of the circle,then /_OPT+/_POT=30o (c) 60o( c) 90o (d) 180o

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