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Cos 110 as a function of a positive acute angle.
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Cos 110 as a function of a positive acute angle.

User Marcodor
by
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1 Answer

2 votes

Answer:

- cos70°

Explanation:

Using the trigonometrical identity

cos(180 - x)° = - cos x°, thus

cos110° = cos(180 - 110)° = - cos70°

User Mirabilos
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