Related Questions
The cross-section of a railway tunnel is a rectangle 6 m broad and 8 m high surmounted by a semi-circle as shown in the figure. The tunnel is 35 m long. Find the cost of plastering the internal surface of the tunnel (excluding the floor) at the rate of ₹ 2.25 per m2.
Prove that :
sin A(1 + tan A) + cos A(1 + cot A) = sec A + cosec A
Prove that :
sin2 A tan A + cos2 A cot A + 2 sin A cos A = tan A + cot A