Solve the Differential Equation $$\frac { d y } { d x } = 8 x ^ { 7 } \sec y$$

question 66

Multiple Choice

Solve the differential equation.
- $$\frac { d y } { d x } = 8 x ^ { 7 } \sec y$$

• A) \(y = \sin ^ { - 1 } \left( x ^ { 8 } + C \right)\)
• B) \(y = \sin \left( x ^ { 8 } + C \right)\)
• C) \(y = \cos ^ { - 1 } \left( x ^ { 8 } + C \right)\)
• D) \(y = x ^ { 8 } + C\)

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A method of costing that includes only variable production costs — costs that change with the level of output — in the calculation of unit costs.