Question

3.
A sum at simple interest at 13 12 % per annum amounts to Rs 2502.50 after 4
years. Find the sum.
]
(A) Rs 1575
(B) Rs 1600 (C) Rs 1625 (D) Rs 1800​

Answer 1

Answer:

In ∆ABC, prove that

[tex]sin \frac{A}{2} + sin \frac{B}{2} - sin \frac{C}{2} =

- 1 + 4 cos \frac{\pi - A}{4} cos \frac{\pi - B}{4} sin \frac{\pi - C}{2}