Please help with this two questions asap Thanks It's on further trigonometric i

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secondary 4 | A Maths
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secondary 4 A Maths Singapore

Please help with this two questions asap
Thanks
It's on further trigonometric identities

Date Posted: 5 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Use double angle identity for cos so that the 1 is cancelled out

Date Posted: 5 years ago