The angle A is found in quadrant 3, such that = −
. Determine the exact value
of sec (Decimal answers using a calculator will not be accepted). [3]
10) All progression work must be shown for full marks. Any unclear or questionable steps
made will not be credited.
Prove the identity: !"#$
#%!$ − !"&$
&'($ = − ) ∙ )