Select the Functions That Have Identical Graphs $y = \sin \left( 3 x + \frac { \pi } { 6 } \right)$

question 55

Multiple Choice

Select the functions that have identical graphs.
-(i) $y = \sin \left( 3 x + \frac { \pi } { 6 } \right)$
(ii) $y = \cos \left( 3 x - \frac { \pi } { 6 } \right)$
(iii) $y = \cos \left( 3 x - \frac { \pi } { 3 } \right)$

• A) \(\mathrm { i }\) and \(\mathrm { ii }\)
• B) \(\mathrm { i }\), ii and iii
• C) ii and iii
• D) \(\mathrm { i }\) and \(\mathrm { iii }\)

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