11. State whether the following are true or false. Justify your answer. (1) The value of tan A is always less than 1.ro 12 (11) sec A for some value of angle A. 5 (iii) cos A is the abbreviation used for the cosecant of angle A. (iv) cot A is the product of cot and A. 12 (v) sin = 4 for some angle 0. 3.
Answers
Answered by
21
Answer:
1. A person is standing between two vertical mountains. the person fire a gun then hears the first echo from the nearby mountain in a time 3 second and here second echo from far mountain in a time 4 second. What is the distance between two mountains?
2. A boy is standing between two walls. the wall closer to him is at the distance of 680 m. if he shouts , he hears the first echo after 4 second and another after 2 second. What is the velocity of sound in air and what is the distance between two walls.
Similar questions