rebekahlm
13.01.2021 •
Mathematics
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Ответ:
(c) Addition and Quotient identity
Step-by-step explanation:
Given
--- The expression missing from the question
Solving (a): Write the left hand side in terms of sin and cosine
In trigonometry:
and
So, the expression becomes:
Rewrite as:
Solving (b): Simplify
Change / to *
Solving (c): The property used
To do this, we need to further simplify
Take LCM
Add the numerator
Apply quotient identity
This gives
Hence, the properties applied are:
Addition and Quotient identity