The value of cos1°. cos2°.cos3°..........cos179° is
If \(tan\theta = {a \over b}\), then \({a.sin\theta + b.cos\theta \over {a.sin\theta - b.cos\theta}}\) is:
If cot2 θ + cot4 θ = 2, then the value of 2 sin4 θ + sin2 θ is:
After giving three successive discounts of 15%, 5% and p%, respectively, on the marked price of an article of Rs. 4,800, It is sold for Rs. 3,100.80. What is the value of p?
The value of 80° in radian is