Please help me with question 5

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secondary 4 | A Maths
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secondary 4 A Maths Singapore

Please help me with question 5

Date Posted: 4 years ago

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Hi Germaine! Here’s 5i

Date Posted: 4 years ago

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Alternative method of part(I)

Date Posted: 4 years ago

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And here’s 5ii. It’s important to learn how to use the trigo identities to manipulate equations in order to solve them.

Date Posted: 4 years ago

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My version

Date Posted: 4 years ago

Eric Nicholas K

4 years ago

Alternatively, you can convert the angles using the double angle formula as well to solve the equations, but this approach is much more difficult.