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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.............

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.............


 

Grade:9

1 Answers

SAGAR SINGH - IIT DELHI
878 Points
13 years ago

Dear sai,

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

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Sagar Singh

B.Tech IIT Delhi

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