[" 6"(ii)cos10^(@)cos30^(@)cos50^(@)cos7...

[" 6"(ii)cos10^(@)cos30^(@)cos50^(@)cos70^(@)=(3)/(16)],[" n "30^(@)" ."]

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cos10^(0)cos30^(0)cos50^(@)cos70^(0)

cos 10^(@) cos 30^(@) cos 50^(@) cos 70^(@) =(3)/(16)

Prove that cos10^(@)cos30^(@)cos50^(@)cos70^(@)=(3)/(16)

Prove that cos10^(@)cos30^(@)cos50^(@)cos70^(@)=(3)/(16)

cos 10^(@) cos 30^(@) cos 50^(@) cos 70^(@) =

Prove that: cos10^(0)cos30^(@)cos50^(@)cos70^(@)=(3)/(16)

sin60^(@).cos30^(@)+cos30^(@)*sin60^(@)

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Prove that cos10^@cos30^@cos50^@cos70^@=3/(16) .

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