cos (½π-p)+cos(½π+p)
Matematika
adinda730
Pertanyaan
cos (½π-p)+cos(½π+p)
1 Jawaban
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1. Jawaban ahreumlim
Cos (½π-p)+cos(½π+p)
= cos ½π . cos p + sin ½π . sin p + cos ½π . cos p - sin ½π . sin p
= 2 . cos ½π . cos p
= 2 . 0 . cos p
= 0