$$\frac{\tan a\ +\ \tan b}{1\ +\ \tan a.\tan b}$$

$$\frac{\tan a\ -\ \tan b}{1-\tan a.\tan b}$$

2sin $$\alpha$$ .cos $$\alpha$$

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FLASHCARD QUESTION

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1

2.

FLASHCARD QUESTION

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1

3.

FLASHCARD QUESTION

Front

Back

4.

FLASHCARD QUESTION

Front

Back

5.

FLASHCARD QUESTION

Front

sin (a+b) =

Back

sina.cosb + sinb.cosa

6.

FLASHCARD QUESTION

Front

sin (a-b) =

Back

cosa.cosb - sina.sinb

7.

FLASHCARD QUESTION

Front

tan (a+b) =

Back

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