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leva [86]
3 years ago
15

Can someone please explain how I find this answer so I can do it on my own??

Mathematics
1 answer:
anygoal [31]3 years ago
7 0

Answer: That seems right. Maybe you didn't simplify. Then, it would be 8/11.

Step-by-step explanation:

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Step-by-step explanation: plug in 4 for x

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Using addition formula solve tan 15​
salantis [7]

Answer:

2 - \sqrt{3}

Step-by-step explanation:

Using the addition formula for tangent

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tan(60 - 45)°

= \frac{tan60-tan45}{1+tan60tan45}

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Rationalise the denominator by multiplying numerator/ denominator by the conjugate of the denominator.

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= \frac{(\sqrt{3}-1)(1-\sqrt{3})  }{(1+\sqrt{3})(1-\sqrt{3})  } ← expand numerator/denominator using FOIL

= \frac{\sqrt{3}-3-1+\sqrt{3}  }{1-3}

= \frac{-4+2\sqrt{3} }{-2}

= \frac{-4}{-2} + \frac{2\sqrt{3} }{-2}

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3 0
3 years ago
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Step-by-step explanation:

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