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Okay, wild, let's tackle these.
5. From the top of a 20 m high cliff the angle of a depression of a b information on a diagram.
Since the question is cut off, we will draw a diagram showing a 20 m high cliff and a generic angle of depression.
Step 1: Draw a vertical line representing the cliff. Step 2: Draw a horizontal line from the top of the cliff representing the observer's line of sight. Step 3: Draw a line downwards from the top of the cliff to an object (e.g., a boat 'B') at sea level. Step 4: Label the height of the cliff as . Step 5: Label the angle between the horizontal line of sight and the downward line of sight as the angle of depression, .
\begin{tikzpicture} % Cliff \draw[thick] (0,0) -- (0,2); \node[left] at (0,1) {$20 \text{ m}$}; \node[below] at (0,0) {Ground}; % Observer at top of cliff \node[above left] at (0,2) {Observer}; % Horizontal line of sight \draw[dashed] (0,2) -- (3,2); \node[above] at (1.5,2) {Horizontal Line of Sight}; % Object (boat) \node[below] at (3,0) {B}; \draw[thick] (0,0) -- (3,0); % Ground line % Line of sight to object \draw[thick] (0,2) -- (3,0); % Angle of depression \draw pic [draw, angle radius=0.7cm, "$\theta$"] {angle = { (3,2) -- (0,2) -- (3,0)}}; \end{tikzpicture}6. What is the back bearing of 200°?
Step 1: Determine if the given bearing is greater than or equal to . The given bearing is . Since , we subtract to find the back bearing.
Step 2: Calculate the back bearing.
Step 3: Express the back bearing in three digits. The back bearing is .
7. A ship sails NW from a port to take supplies to an oil rig. What is the bearing to return from the oil rig to the port?
Step 1: Determine the bearing from the port to the oil rig. Sailing NW (North-West) means the direction is west of North. Measured clockwise from North, this is . So, the bearing from the port to the oil rig is .
Step 2: Calculate the back bearing from the oil rig to the port. Since the bearing from the port to the oil rig () is greater than , we subtract to find the back bearing. The bearing to return from the oil rig to the port is .
8. Ben and Emma are out flying a kite. Emma can is making a 70° angle with the ground. The kite 50 feet away. To the nearest foot, how many f
Assuming "50 feet away" refers to the length of the kite string (the hypotenuse of the right-angled triangle formed by the kite, the ground, and the string), and the question asks for the height of the kite.
Step 1: Identify the known values and the unknown. • Angle of elevation () = • Length of kite string (hypotenuse) = • Height of the kite (opposite side) =
Step 2: Choose the appropriate trigonometric ratio. Since we know the hypotenuse and the angle, and we want to find the opposite side, we use the sine function:
Step 3: Substitute the known values into the formula.
Step 4: Solve for .
Step 5: Calculate the value and round to the nearest foot. Using a calculator, . Rounding to the nearest foot: The height of the kite is approximately .
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This psychology problem is solved step by step below, with detailed explanations to help you understand the method and arrive at the correct answer.