Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
|
No Answers Yet
Help max! Anyone can contribute an answer, even non-tutors.
i don't know how to solve, please help me!
Date Posted: 4 years ago
Views: 281
for sin & cos functions of the form …
y = a cos (bx + c) + d
y = a sin (bx + c) + d
… the period is 2pi/b or 360/b.
for (i),
y = cos [(1/2)x + pi/3] + pi
period = 2pi/(1/2) = 4pi
for (ii),
apply double angle formula …
y = (cos 2x)^2
= (1/2) cos 4x + 1/2
period = 2pi/(4) = (1/2)pi
y = a cos (bx + c) + d
y = a sin (bx + c) + d
… the period is 2pi/b or 360/b.
for (i),
y = cos [(1/2)x + pi/3] + pi
period = 2pi/(1/2) = 4pi
for (ii),
apply double angle formula …
y = (cos 2x)^2
= (1/2) cos 4x + 1/2
period = 2pi/(4) = (1/2)pi
360 Tutoring Program