Question #ba874

1 Answer
Oct 8, 2017

cota=89

Explanation:

Given, secatana=13

1cosasinacosa=13

1cosa.cosasina=13

1sina=13

coseca=13 [ squaring both sides]

cosec2a=19

1+cot2a=19 [weknow,1+cot2a=cosec2a]

cot2a=191

cot2a=89

cota=89