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Vadim26 [7]
3 years ago
12

: Đẳng thức nào sau đây đúng ? A. cos4x – sin4x = 2-cos2x B. cos4x – sin4x = 1+2sin2x

Mathematics
1 answer:
Mazyrski [523]3 years ago
3 0

Step-by-step explanation:

A. cos4x-sin4x=2-cos2x

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<h3>What is a Qualitative and a Quantitative Data?</h3>

A quantitative data can be described as a type of data that you can measure or counted, and also given a numerical value to, while a qualitative data is a type of data that cannot be expressed using numbers.

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Examples of qualitative data include hair color, religion, nationality, etc.

Expenses of respondents can be given numerical values, therefore, expenses of respondents in a survey is a quantitative data and the level of measurement is a ratio scale.

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brainly.com/question/96076

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