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An observer on the ground is [tex]x[/tex] meters from the base of the launch pad of a rocket, which is at the same level as the observer. A few seconds after the rocket takes off vertically, the observer sees its tip at an angle of [tex]q^{\circ}[/tex] from the horizontal. How far above the ground is the tip of the rocket at that instant? Assume that the ground is level.

A. [tex]\frac{r}{\operatorname{Lim}}[/tex]
B. [tex]\frac{2}{3}[/tex]
C. [tex]x \tan q[/tex]
D. [tex]x \sin q[/tex]
E. [tex]x \cos q[/tex]

Answer :

To solve this problem, we need to find the height of the rocket above the ground level based on the given information. Here's a step-by-step solution for this:

1. Identify the Given Information:
- The observer is [tex]\( x \)[/tex] meters away from the base of the launch pad.
- The rocket is seen at an angle of [tex]\( q \)[/tex] degrees from the horizontal.

2. Understand the Trigonometric Relationship:
- We can use the tangent of the angle [tex]\( q \)[/tex] in right-triangle trigonometry, which relates the opposite side (height of the rocket) to the adjacent side (distance [tex]\( x \)[/tex]).

The tangent function is defined as:
[tex]\[
\tan(q) = \frac{\text{opposite side}}{\text{adjacent side}}
\][/tex]

Here, the opposite side is the height of the rocket above the ground, and the adjacent side is the distance [tex]\( x \)[/tex].

3. Set Up the Equation:
[tex]\[
\tan(q) = \frac{\text{height}}{x}
\][/tex]

Solving for the height, we get:
[tex]\[
\text{height} = x \cdot \tan(q)
\][/tex]

4. Determine the Correct Answer:
- The height of the rocket above the ground is given by [tex]\( x \cdot \tan(q) \)[/tex].

By comparing this with the provided answer choices, we can see that the correct option is:

[tex]\[ \boxed{x \tan 9} \][/tex]

So, the height of the rocket above the ground at that instant is [tex]\( x \tan q \)[/tex] meters.

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Rewritten by : Barada