If four forces act at a point 'O' as sho...

If four forces act at a point 'O' as shown in the figure and if O is in equilibrium then the value of `'theta'` & 'P' are

`15^@, 10sqrt(2) N`

`45^@, 10N`

`75^@, 10 sqrt(2) N`

`90^@, 20 N`

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