Establish the Identity $$\tan \left( x - \frac { \pi } { 4 } \right) = \frac { \tan x - 1 } { 1 + \tan x }$$

question 198

Essay

Establish the identity.
- $$\tan \left( x - \frac { \pi } { 4 } \right) = \frac { \tan x - 1 } { 1 + \tan x }$$

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Definitions:

Equivalent Units

A concept in cost accounting used to calculate the number of complete units that could have been produced given the total amount of raw materials and effort expended.

Total Materials Costs

The sum of all costs associated with the materials required to manufacture a product.

Work In Process Inventories

Inventories that represent goods that are partially completed in a manufacturing process.

Conversion Costs

Costs related to transforming raw materials into finished goods, typically including direct labor and manufacturing overhead.