lilbopeep21
27.06.2019 •
Mathematics
Write the expression in terms of sine and cosine, and then simplify so that no quotients appear in the final expression. sec beta - cos beta. a.1-cos^2beta b.sin^2beta c.cos^2beta d.1 e.sin beta tan beta
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Ответ:
E
Step-by-step explanation:
The expression given is: sec β - cos β ( i will write "beta" instead of the symbol β)
We know that
Substituting this into the the expression and doing some algebra manipulation, we have:
Using the identity (also ), we can now write:
We know , substituting this, we have:
Answer choice E is the right answer.
Ответ: