## Profit and Loss Sums Solution

- Math Solution Profit and Loss through Videos: Part 2
- Math Solution Profit and Loss through Videos: Part1
- Prateek travels from Agra to Delhi to buy goods which he get 10 % cheaper in Delhi

## Algebra

- Express the following as a sum of perfect square | 16a2 + b2 + 9c2 – 4ab – 3bc – 12ca
- If a2+b2+4c2 = ab+2bc+2ca | Expansion – Algebra

## Trigonometry

- ABCD is a Rhombus. DPR and CBR are straight lines. Prove that: DP.CR=DC.PR
- In triangle ABC, AB > AC. | E is the mid-point of BC | and AD is perpendicular to BC
- OP, OQ and OR are drawn perpendiculars to the sides BC, CA and AB of ∆ ABC |Prove that AR2 +BP2 +CQ2 = AQ 2 + CP 2+BR2
- AB = BC and AD is perpendicular to CD. Prove that AC2 = 2.BC. DC
- ABCD is a parallelogram | Prove that ∆ BCF and ∆ DFE are equal in area
- Geometry Sum | ABCD is a square. Prove in each case ∆APD ≅ ∆BPC | Find Angle DPC Angle PCD and Angle PCD |