## Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.

### See 1 Answer

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You can use either double-angle formula followed by R-formula to get the answer or my method below.

EDIT (for the one on top): Change '-3 cos x' to '-3 cos 2x'.

EDIT (for the one on top): Change '-3 cos x' to '-3 cos 2x'.

Date Posted:
2 weeks ago