A. 1/3 < y < 1
B. 1/3 ≤ y ≤ 1
C. 1/3 ≤ y ≤ 3
D. none
If α, β, γ are the angles made by a line with x, y, z axes in positive directions then the range of cos α cos β+ cos β cos γ+cos γ cos α is
If tan θ+tan (600+θ) tan (1200+θ) =3, then θ=
If sin θ=-7/25 and is not in the first quadrant, then (7cot θ -24 tan θ) / (7cot θ+24 tan θ) =
If tan A,tan B are the roots of x2-px+q=0,the value of sin2(A+B) is
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