1.

If two sides of a triangle are roots of the equation x2−7x+8=0 and the angle between these sides is 60∘, then the product of in-radius and circum-radius of triangle is

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If two sides of a triangle are roots of the equation x27x+8=0 and the angle between these sides is 60, then the product of in-radius and circum-radius of triangle is



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