Math, asked by tauahif2039, 9 months ago

Show that 2tan inverse = cos inverse ( 1- x square) divided by (1+ x square)

Answers

Answered by basnetjkb

3

ANSWER:-

tan-1x = y

x= tany

2tan-1x= cos-1 1-x2/1+x2

= cos-1 1-tan2y/1+tan2y

= cos-1(cos2y)

=2y

=2tan-1x

therefore, 2tan-1x = cos-1 1-x2/1+x2

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