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What is the right choice for question 1) ? http://postimg.org/image/kasvxkp9z/

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lkballer24 | Student, Grade 11 | Valedictorian

Posted August 17, 2013 at 10:05 PM via web

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What is the right choice for question 1) ?

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baxthum8 | High School Teacher | (Level 3) Associate Educator

Posted August 18, 2013 at 12:02 AM (Answer #1)

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y = a`cos(x-c)`

a - represents amplitude; c represents horizontal shift

therefore an amplitude of `(1/2)`

and a phase shift of `pi/4`

means the equation should be:  y = `(1/2)cos(x -pi/4)`

which is choice "b"

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