e Question Papers113ORmakes an anglewith AB. If cose: 2 and Oli# 3cm.

1.	e Question Papers113ORmakes an anglewith AB. If cose: 2 and Oli# 3cm. findthe length of its diagonals AC and BD
Answer» Let the diagonals AC and BD intersect each other at O Thus according to question Angle BAO = Angle alphaandCos Alpha = 2/3 Thus in triangle AOBCos alpha = AO / ABand Sin alpha = OB/AB1/3 = 3/ABThus AB = 91/2 = 3/AOAO = 6Thus AC= 12and BD = 6

e Question Papers113ORmakes an anglewith AB. If cose: 2 and Oli# 3cm. findthe length of its diagonals AC and BD

Answer»

Let the diagonals AC and BD intersect each other at O

Thus according to question

Angle BAO = Angle alphaandCos Alpha = 2/3

Thus in triangle AOBCos alpha = AO / ABand Sin alpha = OB/AB1/3 = 3/ABThus AB = 91/2 = 3/AOAO = 6Thus AC= 12and BD = 6