hitunglah cos 225° . Sin 240°+ Tan 315°
Matematika
enyjanuarisni
Pertanyaan
hitunglah cos 225° . Sin 240°+ Tan 315°
2 Jawaban
-
1. Jawaban dnnyz07
cos 225
= cos (180 + 45)
= - cos 45
= -1/2 √2
sin 240
= sin (180 + 60)
= - sin 60
= -1/2 √3
tan 315
= tan (360 - 45)
= - tan 45
= - 1
-1/2 √2 x -1/2 √3
= 1/4 √6 + (-1)
= ( 1/4 √6 ) - 1 -
2. Jawaban Agmonias31
-1/2√2 x -1/2√3 + (-1)
= 1/4√6 - 1
=(√6-4)/4