Given: [tan^(−1)(x)]^2+[cot^(−1)(y)]^2=1 Find the tangent line equation to the graph at the point (1,0) by implicit differentiation

heelallev5

heelallev5

Answered question

2022-08-05

Given:
[ tan 1 ( x ) ] 2 + [ cot 1 ( y ) ] 2 = 1
Find the tangent line equation to the graph at the point (1,0) by implicit differentiation

I found the derivative:
d y d x = 4 tan 1 ( x ) cot 1 ( y ) ( y 2 + 1 ) ( x 2 + 1 )
I may have done my derivative wrong, but my main concern is at some point 0 will be plugged into cot inverse, resulting in division by zero.

Answer & Explanation

pokajalaq1

pokajalaq1

Beginner2022-08-06Added 18 answers

2 tan 1 x 1 + x 2 d x 2 cot 1 y 1 + y 2 d y = 0
d y d x = ( 1 + y 2 ) tan 1 x ( 1 + x 2 ) cot 1 y
Note that (1,0) doesn't lie on the graph.

The graph can be parametrized as ( x , y ) = ( tan cos t , cot sin t )

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