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lisov135 [29]
3 years ago
9

Please help with this question.

Mathematics
1 answer:
Rzqust [24]3 years ago
4 0
(cos Ф -cos Ф)² + (cos Ф + cos Ф)²

Firstly: (cos Ф -cos Ф)² = 0² = 0

Secondly :(cos Ф + cos Ф)² = (2cos Ф)². = 4. (cos Ф)² = 4cos² Ф

Mind you when you raise a cosine (or sin or tan...) to the n power, the n power should affect the cosine only and NOT the angle Ф

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2(-1/4)(3)

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And I'm stuck again ahahah.
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<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ Angle XBC = 55 degrees because corresponding angles are equal

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Find the length of a side of an equilateral triangle given its altitude is six inches long.
vampirchik [111]
An equilateral triangle has three 60 degree angles.
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Source:
http://www.1728.org/trig2.htm


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