Math Problem Statement
Find the joint equation of line passing through the origin having the intersections 30°
and 60°.
Solution
To find the joint equation of lines passing through the origin that make angles of 30° and 60° with the positive x-axis, we can use the general equation for a straight line in the plane:
where is the slope of the line. The slope of a line making an angle with the positive x-axis is given by:
Steps:
-
For the line making an angle of 30° with the positive x-axis:
- The slope .
- We know .
- So, the equation of the line is:
-
For the line making an angle of 60° with the positive x-axis:
- The slope .
- We know .
- So, the equation of the line is:
Joint Equation of the Two Lines:
To find the joint equation of these two lines, we multiply their individual equations:
Expanding this product:
Simplifying:
To further simplify :
So the joint equation becomes:
This is the joint equation of the two lines passing through the origin with angles of 30° and 60° with the x-axis.
Would you like more details or have any questions?
Relative Questions:
- What would the joint equation be if the angles were 45° and 135°?
- How does the joint equation change if the lines do not pass through the origin?
- Can you derive the joint equation for lines making complementary angles?
- How do the slopes of the lines affect the nature of the joint equation?
- What is the geometric interpretation of the joint equation of two lines?
Tip:
When multiplying linear equations to find a joint equation, always simplify the intermediate steps to ensure accuracy and ease of solving.
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Math Problem Analysis
Mathematical Concepts
Geometry
Trigonometry
Equations of Lines
Formulas
Slope formula: m = tan(θ)
Theorems
-
Suitable Grade Level
High School
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