Class 10th Maths Trigonometry Case Study Based Question from RD Sharma A helicopter lifts up 1000 скачать в хорошем качестве

Class 10th Maths Trigonometry Case Study Based Question from RD Sharma A helicopter lifts up 1000

Class 10th Maths Trigonometry Case Study Based Question from RD Sharma A Helicopter lift up 1000 ft over an island and spots a swimmer that need to be rescued. Using a distant land mark , the helicopter pilot determines the angle of depression . (1) As the angle of depression increases what will be the effect ? The helicopter gets further from the island The helicopter gets closer to the island The swimmer gets closer to the island The swimmer gets further from the island (2) How does the swimmers distance from Island changes as the angle of depression is halved from 60° to 30 degree the swimmer 's distance decreases to less than a quarter of its starting distance the swimmers distance from the island Doubles the swimmer's distance from the island increases three times The swimmers distance from the island is halved. (3) For which angle of depression both the helicopter and swimmer's will be at the same distance 30° 45° 60° 90° (4) Let the swimmer start out 1019 ft from the island. If he swims half of the distance what is the angle of depression? nearly 30 degree nearly 45 degree nearly 60 degree nearly 90 degree (5) How would the angle of depression be affected if the helicopter left initial position and moves vertically upward ? angle of depression doesn't change the angle of depression increases angle of depression decreases none of the above by Shilpa Chaudhary