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Yuki888 [10]
3 years ago
12

Need some help with this question please

Mathematics
1 answer:
katrin [286]3 years ago
8 0

Answer:

  cos(θ) = -3/5

Step-by-step explanation:

The cosine of the reference angle (in the first quadrant) is ...

  cos(θ) = √(1 -sin(θ)²) = √(1 -(4/5)²) = √(1 -16/25) = √((25-16)/25)

  = √(9/25) = 3/5 . . . . in the first quadrant

In the second quadrant, the cosine is negative, so the answer is ...

  cos(θ) = -3/5

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How do I figure out what 1/10 of 6000 is?
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The way I like to figure out problems like this is to write it out like,

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3 years ago
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