Help me with 9e please, I have been spending 30 mins on it. Thanks in advance.

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secondary 4 A Maths Singapore

Help me with 9e please, I have been spending 30 mins on it. Thanks in advance.

Date Posted: 5 years ago

Mathaddict100

5 years ago

Managed to prove the answer.Will show it to you shortly.

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Hope these steps help. :)

Date Posted: 5 years ago

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Date Posted: 5 years ago

Eric Nicholas K

5 years ago

Double angle formulae apply here. Note that angle 4A is double that of anngle 2A, so double angle applies to 4A and 2A also.