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Un article trouvé pour ce sujet.
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cos (3pi/2 -x) |
2019-11-20 |
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sam pose la question :
1. express the following as a trigonometric function of angle x for cos (3pi/2 -x)
the answer in the textbook is -sin x but i am unsure of the process to get the answer.
Penny Nom lui répond. |
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