Verify That Each Equation Is an Identity $$\cos ( 4 u ) = 2 \cos ^ { 2 } ( 2 u ) - 1$$

question 299

Short Answer

Verify that each equation is an identity.
- $$\cos ( 4 u ) = 2 \cos ^ { 2 } ( 2 u ) - 1$$

---

Definitions:

Compounded Annually

An interest calculation method where interest is calculated once a year and added to the principal, leading to an increase in the amount of subsequent interest.

RRSP

Registered Retirement Savings Plan (RRSP) is a Canadian financial account designed for individuals to save for retirement, offering tax benefits to incentivize saving.

Compounded Quarterly

Interest on a loan or investment is calculated four times a year, with each interest payment added to the principal.

RRSP

Registered Retirement Savings Plan, a Canadian financial account for holding savings and investment assets, aimed at retirement.