Use Identities to Solve Trigonometric Equations
Solve the Equation on the Interval

question 188

Multiple Choice

Use Identities to Solve Trigonometric Equations
Solve the equation on the interval [0, 2π) .
- $\cos 2 x = \sqrt { 2 } - \cos 2 x$

• A) \(\frac { \pi } { 8 } , \frac { 7 \pi } { 8 } , \frac { 9 \pi } { 8 } , \frac { 15 \pi } { 8 }\)
• B) \(0 , \frac { 2 \pi } { 3 } , \pi , \frac { 4 \pi } { 3 }\)
• C) \(\frac { \pi } { 4 } , \frac { 3 \pi } { 4 } , \frac { 5 \pi } { 4 } , \frac { 7 \pi } { 4 }\)
• D) no solution

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Definitions:

Required Rate

The least yearly interest rate that persuades individuals or entities to dedicate capital to a distinct project or investment opportunity.

Net Present Value

The difference between the present value of cash inflows and the present value of cash outflows over a period of time. It's used in capital budgeting to assess the profitability of an investment or project.

Net Present Value

Net Present Value (NPV) is a financial metric that calculates the present value of all future cash flows of an investment, minus the initial investment cost.

Analyzing

The process of examining data, documents, or systems in detail in order to understand them better and make informed decisions.