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Shashank Shah

· started a discussion

· 1 Months ago

Given answer is correct

Question:

Find the value of cos12 cos24 cos36 cos48 cos60 cos72 cos84.Given cos 36o =  5+14    cos 75o =  5 -14   

Options:
A)

1128    

B)

164    

C)

1256    

D)

1512    

Solution:

Ans: (a)

  

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