Establish the Identity $$\tan \left( \frac { \pi } { 2 } + x \right) = - \cot x$$

question 307

Essay

Establish the identity.
- $$\tan \left( \frac { \pi } { 2 } + x \right) = - \cot x$$

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Definitions:

Investment Turnover

A ratio indicating how efficiently a company generates sales revenue from its investment in assets.

Return on Investment

A measurement of the gain or loss generated on an investment relative to the amount of money invested.

Residual Income

A measure of profit that exceeds the minimum required return on an investment or business venture.

Percentage

A proportion or share in relation to a whole, typically expressed as a fraction of 100.