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Show that sec(π/2-θ-2nπ) = cscθ? Simplify (sin(7x)+sin(-2x))/(cos(7x)-cos(-2x)) Hint: let A + B = 7x. Is 2/(-1-2sinx) correct? Fintie Shock proof case in green for $15.99? Citos 20 mg? Immediately after a used truck is required, a new motor is installed at a total cost of $3,850. is this a capital or a revenue expenditure?