Convert the Expression $$\tan \frac { a } { 2 }$$

question 24

Multiple Choice

Convert the expression.​ $$\tan \frac { a } { 2 }$$ ​ ​

• A)​ \(\csc a - \tan a\)
• B) \(\csc a + \cot a\)
• C)​ \(\cos a - \cot a\)
• D) \(\cos a + \cot a\)
• E) \(\csc a - \cot a\)

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Definitions:

DC Motors

Electric motors that run on direct current electricity, commonly used in various applications from small toys to large vehicles.

Relays

Electrically operated switches used to control circuits.

Fretting

Wear at the contact surfaces of two materials that occurs from repeated cyclical motion or vibration, often seen in electrical connections.

Thermal Cycling

A pattern of heating and cooling that, over time, can cause resistance to build up in electrical connections.