If the Terminal Point Determined By $\text { t }$ Is $\left( \frac { 1 } { \sqrt { 5 } } , - \frac { 2 } { \sqrt { 5 } } \right)$

question 37

Essay

If the terminal point determined by $\text { t }$ is $\left( \frac { 1 } { \sqrt { 5 } } , - \frac { 2 } { \sqrt { 5 } } \right)$ , find $\sin$ $\text { t }$ , $\cos$ $\text { t }$ and $\tan$ $\text { t }$ .

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Definitions:

Average Variance

The mean of the squared deviations from the mean of a data set, indicating its volatility or variability.

Investment Period

The investment period is the duration over which an investment is held before it is sold or liquidated.

Rate Of Inflation

The annual percentage rate at which the general level of prices for goods and services is rising, and subsequently, purchasing power is falling.