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

Mathematics

2 answers:

Julli [10]3 years ago

8 0

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

adell [148]3 years ago

8 0

Answer:

Option B is your answer

Step-by-step explanation:

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