Question
Find the compound interest on Rs. 8000 at 10% per annum
for 2 years, compounded annually.ÂSolution
Amount A = P(1 + r/100)² = 8000 × (1 + 10/100)² = 8000 × (1.10)² = 8000 × 1.21 = 9680 Compound interest = A − P = 9680 − 8000 = 1680
If cosB = sin(1.5B - 15°), then find the measure of 'B'.
- If sin A = 1/2, then what will be the value of cot² A?
If 2cosA + secA = 2√2 , 0° < < 90°, then the value of 2(sec 4 A + cosec 4 A) is:
If cos θ + sec θ = √5, then the value of cos³ θ+ sec³ θ is:
Find the value of sin 30°.
If X = 15°, find the value of:
sin²(4X) + cos²(3X) - tan²(2X)- If sin 2a = (3/4), then find the value of (sin a + cos a).

- If sin 2a = (1/2), then find the value of (sin a + cos a).
If 10sin²x + 6cos²x − 8 = 0, then find the value of sinx, given that 0° < x < 90°.