Linear Equations

Step 1: Write in terms of and . Given that: Step 2: Simplify. We know that , so: Step 3: Solve for : Therefore, Final Answer: Correct Option: (c)

Step 1: Write both equations in slope-intercept form .
For . Hence, slope .
For , slope . Step 2: The acute angle between two lines with slopes and is given by: Substitute values: Step 3: The question asks for the obtuse angle between the lines. The obtuse angle is: Final Answer: Correct Option: (a)