Math, asked by ReenaRobin, 10 months ago

sin^2A + cos^2 A=1,then use it to prove sin^4-cos^4=1-2cos^2A

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Answered by shashwat0309

0

my answer is right ....

ReenaRobin: yes you are right

shashwat0309: then how it is deleted

shashwat0309: the moderator are so cheapppp

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