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

Which sum or difference identity would you use to

Ответ:

vcasela

31.12.2021

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

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Ответ:

lesly0913

15.02.2021

Mathematics

cool :) its not bad bein that age

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