Which of the following is true for 0° < θ < 90° ?
The value of (tan29°cot61°-cosec261°)+cot254°-sec236°+(sin21°+sin23°+sin25°+.....+sin289°) is:
A shopkeeper buys some notebooks at the rate of 12 for Rs. 222, and an equal number of notebooks at 10 for Rs. 225. If he sells all the notebooks at a profit of 20%, then the selling price of the 15 notebooks is:
The reduction of 15% in the price of salt enables a person to buy 2 kg more for ₹272. The reduced price of salt per kg (in ₹) is:
The value of \({sin\theta+cos\theta-1\over sin\theta-cos\theta+1}\times\)\({ tan^2\theta(cosec^2\theta-1)\over sec\theta-tan\theta}\) is :