find the angle Between the curves y^2=4x, x^2+y^2=5 in tangents chapter
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Given Find the angle Between the curves y^2=4x, x^2+y^2=5 in tangents chapter
- We have y^2 = 4x ----------1
- and x^2 + y^2 = 5 ----------- 2
- Now we need to find the intersection point of two curves.
- Substituting y^2 = 4x in equation 2 we get
- x^2 + 4x = 5
- x^2 + 4x – 5 = 0
- x^2 + 5x – x – 5 = 0
- x (x + 5) – 1(x + 5) = 0
- (x + 5) (x – 1) = 0
- So x = - 5, x = 1
- Now for x = 1, y^2 = 4x
- y^2 = 4
- y = + - 2
- Now slope of tangent of curve y^2 = 4x will be
- m1 = dy / dx
- So dy / dx = 4/2y
- = 4/4
- = 1
- Now slope of tangent of cure x^2 + y^2 = 5
- m2 = dy / dx
- So dy/dx = d/dx (x^2 + y^2) = 0
- = 2x + 2y dy/dx = 0
- 2y dy/dx = - 2x
- dy/dx = - 2x / 2y
- dy/dx = - x / y
- = - 1 / 2
- So tan theta = m1 – m2 / 1 + m1m2
- = 1 – (- ½) / 1 + (1) (- ½)
- = 1 + ½ / 1 – ½
- So tan theta = 3
- Or theta = tan^-1 3
Reference link will be
https://brainly.in/question/37682834
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