Math, asked by lucy2019, 1 year ago

plz help me it's so urgent

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Answered by luckysono89

1

Answer:0.509765388

Step-by-step explanation:

hope It will help ya

Answered by nnethajireddy

1

Answer:

Step-by-step explanation:

cos(a-b)=cos a. cos b + sin a. sin b

cos (100-40) = cos 60 = 1/2

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