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4b. The archaeologists plan to build two more straight paths, AD and DC. For the paths to go around the site, angle BAD is to be made equal to 85° and angle BCD is to be made equal to 70° as shown in the following diagram. A485° 170 Find the size of angle BAC. 4c. Find the size of angle CAD. 4d. Find the size of angle ACD. 125 B diagram not to scale +70°C 200

4b. The archaeologists plan to build two more straight paths, AD and DC. For the paths to go around the site, angle BAD is to be made equal to 85° and angle BCD is to be made equal to 70° as shown in the following diagram. A485° 170 Find the size of angle BAC. 4c. Find the size of angle CAD. 4d. Find the size of angle ACD. 125 B diagram not to scale +70°C 200

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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4b. The archaeologists plan to build two more straight paths, AD and DC. For the paths to go around the site, angle BAD is to be made equal to 85° and angle BCD is to be made equal to 70° as shown in the following diagram. diagram not to scale 70 A 85- 200 170 (125 в Find the size of angle BAC. 4с. Find the size of angle CAD. 4d. Find the size of angle ACD. 4е. Find the area of the region ABCD. 5a. At Grande Anse Beach the height of the water in metres is modelled by the function h(t) = pcos(q x t) + r, where t is the number of hours after 21:00 hours on 10 December 2017. The following diagram shows the graph of h , for 0 <t < 72.
Transcribed Image Text:4b. The archaeologists plan to build two more straight paths, AD and DC. For the paths to go around the site, angle BAD is to be made equal to 85° and angle BCD is to be made equal to 70° as shown in the following diagram. diagram not to scale 70 A 85- 200 170 (125 в Find the size of angle BAC. 4с. Find the size of angle CAD. 4d. Find the size of angle ACD. 4е. Find the area of the region ABCD. 5a. At Grande Anse Beach the height of the water in metres is modelled by the function h(t) = pcos(q x t) + r, where t is the number of hours after 21:00 hours on 10 December 2017. The following diagram shows the graph of h , for 0 <t < 72.
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