Which sum or difference identity would you use to verify that sin (90° + q) = cos q?

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21-05-2015
Mathematics

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Which sum or difference identity would you use to verify that sin (90° + q) = cos q?

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naǫ naǫ · Answer 1 · 2015-05-21T15:18:53+02:00

naǫ naǫ

21-05-2015

[tex]\hbox{the sum identity:} \\ \sin(\alpha + \beta)= \sin \alpha \cos \beta + \sin \beta \cos \alpha \\ \\ \sin (90^\circ +q)= \\ \sin 90^\circ \cos q+ \sin q \cos 90^\circ= \\ 1 \times \cos q + \sin q \times 0= \\ \cos q[/tex]

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qusaialmustafaovu05k qusaialmustafaovu05k · Answer 2 · 2019-06-17T19:23:32+02:00

qusaialmustafaovu05k qusaialmustafaovu05k

17-06-2019

Answer:

Option B is your answer

Step-by-step explanation:

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