Convert the Expression $\cos ^ { 4 } b - \sin ^ { 4 } b$

question 102

Multiple Choice

Convert the expression. $\cos ^ { 4 } b - \sin ^ { 4 } b$

• A)2 cos b
• B) cos 2b
• C) cos b
• D)2 cos 2b
• E) 4 cos b

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Definitions:

Annually

Pertaining to events or actions that occur once every year.

Present Value

The present worth of a future sum of money or sequence of cash payments, reduced at a particular rate of interest.

PV

An abbreviation for present value, referring to the value today of a future payment or series of payments, adjusted for a specific rate of return.

Discount Rate

This rate, integral to discounted cash flow analysis, is employed for determining the present value of cash flows expected in the forthcoming periods.