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The value of cos e c10^0+cos e c50^0-cos...

The value of `cos e c10^0+cos e c50^0-cos e c70^0` is ____

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The value of cos^2 10^0-cos10^0cos50^0+cos^2 50^0 is equal to 4/3 (b) 1/3 (c) 3/4 (d) 3

The value of cos^2 10^0-cos10^0cos50^0+cos^2 50^0 is equal to 4/3 (b) 1/3 (c) 3/4 (d) 3

The value of cos^2 10^0-cos10^0cos50^0+cos^2 50^0 is equal to

cos e c(360^0)/7 + cos e c(540^0)/7

Prove that: cos 10^0cos30^0cos 50^0cos 70^0=3/(16)

Prove that: cos 10^0cos30^0cos 50^0cos 70^0=3/(16)

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

The value of cos^(2)10^(0)-cos10^(0)cos50^(@)+cos^(2)50^(@) is equal to (4)/(3)(b)(1)/(3)(c)(3)/(4)(d)3

cos e c(360^0)/7+cos e c(540^0)/7= cos e c(180^0)/7 (b) cos e c(90^0)/7 sec(180^0)/7 (d) sec(90^0)/7

cos e c(360^0)/7+cos e c(540^0)/7= cos e c(180^0)/7 (b) cos e c(90^0)/7 sec(180^0)/7 (d) sec(90^0)/7