Two lines are parallel and inclined at an angle less than 90- with the x-axis- thenA- Product of their slopes -1B- Product of their slopes -1C- Product of their slopes -2- sum of their slopes D- None of these

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Standard XII

Mathematics

Definition of Vector

Two lines are...

Question

Two lines are parallel and inclined at an angle less than $90^{\circ}$ with the x-axis, then

Product of their slopes = 1

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Product of their slopes = - 1

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None of these

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Solution

The correct option is D
None of these

If the two lines are parallel their slopes are equal.

Since, both the lines are inclined at an angle less than $90^{\circ}$ , their slope are positive.

So, nothing can be said except that their product is > 0.

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Two lines are parallel and inclined at an angle less than 90∘ with the x-axis, then

The correct option is D None of these If the two lines are parallel their slopes are equal. Since, both the lines are inclined at an angle less than 90∘, their slope are positive. So, nothing can be said except that their product is > 0.

Two lines are parallel and inclined at an angle less than $90^{\circ}$ with the x-axis, then

The correct option is D
None of these

If the two lines are parallel their slopes are equal.

Since, both the lines are inclined at an angle less than $90^{\circ}$ , their slope are positive.

So, nothing can be said except that their product is > 0.