If the resultant of two forces ‘P’ and ‘Q’ acting at an angle ‘θ’ makes an angle ‘α’ with ‘P’, then tan α equals

• A. P sin θ/P - Q cos θ
• B. Q sin θ/P + Q cos θ
• C. P sin θ/P + Q tan θ
• D. Q sin θ/P + Q sin θ