Question

# The equation of the circle touching the initial line at pole and radius 2 is

## The correct answer is:

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Here we used the concept of cartesian lines and some trigonometric terms to solve. With the help of slope we identified the angle between them. Hence, these lines are perpendicular so the angle between them is $90 degrees.$

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Here we used the concept of cartesian lines and some trigonometric terms to solve. With the help of slope we identified the angle between them. Hence, these lines are perpendicular so the angle between them is $90 degrees.$

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Here we used the concept of polar coordinate system and also the trigonometric ratios to find the solution. So the equation is .

### The polar equation of is

Here we used the concept of polar coordinate system and also the trigonometric ratios to find the solution. So the equation is .

### The cartesian equation of is

Here we used the concept of the polar coordinate system and also the trigonometric ratios to find the solution. So the equation is .

### The cartesian equation of is

Here we used the concept of the polar coordinate system and also the trigonometric ratios to find the solution. So the equation is .