A body of weight w placed on an inclined plane is acted upon by a force P parallel to the plane which causes the body just to move up the plane. If the angle of inclination of the plane is and angle of friction is , the minimum value of P, is

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• B. <img src="/_files/images/civil-engineering/applied-mechanics/104-5.59-2.png">
• C. <img src="/_files/images/civil-engineering/applied-mechanics/104-5.59-3.png">
• D. <img src="/_files/images/civil-engineering/applied-mechanics/104-5.59-4.png">