# JUNIOR Class 1 Mathematics Free Doubts and Solutions

### Junior - X - Maths

## Two circles with radii a and b respectively touch each other externally. Let c be the radius of a circle that touches these two circles as well as a common tangent to these two circles. Then ___. (A) (B) (C) (D) None of these

**Vishwaraj**12th February 2016, 6:01 PM

### Junior - X - Maths

## what is the trick to use trignometric identities in proves of trignometric problems????????

**mkcsamu74**23rd July 2015, 9:24 PM

### Junior - X - Maths

## (a-b)2 + (b-c)2 + (c-a)2 = (b-c)(c-a) (c-a)(a-b) (a-b)(b-c)

**Denny Joseph**30th March 2015, 6:26 PM

### Junior - X - Maths

## if x2 +1/x2 =51 then find the value of x3-1/x3

**Denny Joseph**25th March 2015, 5:31 PM