Without using trigonometric tables, evaluate the following:

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asked Mar 19, 2018 in Mathematics by shabnam praween (19,050 points) 5 6 8

Without using trigonometric tables, evaluate the following:

(cos220°​+cos270°​)/(sec250°​-cot240°​) -tan13°​ tan 37°​ tan45°​ tan 53°​ tan 77°​

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answered Mar 19, 2018 by santoshjha (25,550 points) 4 5 6
selected Mar 27, 2018 by Vikash Kumar
 
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The correct answer is

 

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