application of trigonometric all important questions /// NEW revised syllabus
Download all questions https://drive.google.com/file/d/1T3Jb0v2Mjj2c1fHTiKcvQnopa2SFini3/view?usp=sharing Question 1. A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 60° with the wall, then calculate the height of the wall. (2013OD) Solution: ∠ BAC = 180° – 90° – 60o = 30° sin 30° = BCAC 12 = BC 15 2BC = 15 BC = 152 m Question 2. In the given figure, a tower AB is 20 m high and BC, its shadow on the ground, is 203 –√ m long. Find the Sun’s altitude. (2015OD) Solution: AB = 20 m, BC = 203 –√ m, θ = ? In ∆ABC, Question 3. In the figure, AB is a 6 m high pole and CD is a ladder inclined at an angle of 60° to the horizontal and reaches up to a point D of pole. If AD = 2.54 m. Find the length of the ladder. (Use 3 –√ = 1.73) (2016D) Solution: BD = AB – AD = 6 – 2.54 = 3.46 m In rt., ∆DBC, sin 60° = BDDC 3 √ 2 = 3.46 DC 3 –√ DC = 3.46 x 2 ∴ Length of the ladder, DC =...