(sec2 θ - 1)(1 - cosec2 θ) is equal to
-1
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0
2
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If x = h + a cos θ and y = k + a sin θ, prove that (x - h)2 + (y - k)2 = a2.
(cos θ + sin θ)2 + (cos θ - sin θ)2 is equal to
-2