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SAI SUSHANTH Grade: 9
        

does (0,0) belong to x axis and 


cos2A=


a) cos^A-sin^A


b) 1-tan^A/1+tan^A


    but if a=90 the condition is not satisified


     if in a question they give such options without any condition  should we choose both options.............


 

7 years ago

Answers : (1)

SAGAR SINGH - IIT DELHI
879 Points
										

Dear sai,


Yes its very rational to choose both the options......



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Sagar Singh


B.Tech IIT Delhi


sagarsingh24.iitd@gmail.com


7 years ago
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