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Using the formula cos A `=sqrt((1+cos2A)/(2))`30^(@)`,(1)/(2)`.

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Using the formula, sinA = root(1-Cos2A/2), find the value of sin30°, given cos60° = 1/2 | RS 10

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Using the formula, cos A=√(1+cos 2 A/2), find the value of cos 30^∘, it being given that cos 60^∘...

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Using the formula, cos A = √1+cos2A /2 , find the value of cos 30°, it being given that cos 60° = 1/

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