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• Middelbare school
• mavo
• Leerjaar 1

Trigonometric functions 

T. Asylgul

Trigonometry 

Basics of trigonometry 

sin cos tng ctg

Equations 

sin cos

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Sum to Product for Sine Functions 

\sin A + \sin B = 2 \sin\left(\frac{A + B}{2}\right) \cos\left(\frac{A - B}{2}\right) ]

 \sin A - \sin B = 2 \cos\left(\frac{A + B}{2}\right) \sin\left(\frac{A - B}{2}\right) ]

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Cosine Functions

\cos A + \cos B = 2 \cos\left(\frac{A + B}{2}\right) \cos\left(\frac{A - B}{2}\right) ]

 \cos A - \cos B = -2 \sin\left(\frac{A + B}{2}\right) \sin\left(\frac{A - B}{2}\right) ]

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Sine and Cosine Product

\sin A \cos B = \frac{1}{2} [\sin(A + B) + \sin(A - B)] ]

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Add an open question about your subject

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Add a quiz question about your subject

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1. Answer 1
2. Answer 2

Write down three things you 

have learned this lesson

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Ask a question about something you 

haven't understood very well yet

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How to copy a slide

This lesson is complete! But how can you add similar slides to upcoming lessons?

1.  Open this lesson.

2. Checkmark the slides you want to copy in the left side of your screen.

3. Click on Copy.

4. Navigate to the lesson you want to copy the slides to and click: Copy here.

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How to change the colour of a slide

Do you want to add another colour to these slides? Here's how it works:

1.  Navigate to the slide of which you want to change the colour.

2. Changing the background colour:
Select the Droplet at the top of the slide.
3. Changing the text colour:
Select the text and click on Text colour.

4. Choose the colour you like.

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