AIEEE Exam

The values of x between 0 and 2π which satisfy
the equation sinx 8cos x2 = 1 are in A.P. The
common difference of A.P. is -

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AIEEE Other Question

If x = α, β satisfies both the equation
cos^2
x + a cosx + b = 0 and sin^2
x + p sinx + q = 0
then the relation between a, b, p and q is If F1 = (3, 0) and F2 = (–3, 0) and P is any point
on the curve 16x^2
+ 25y^2
= 400 then PF1 + PF2
equals -
(A) 8 (B) 6 (C) 10 (D) 12