jawab
3 sin x + 4 cos x = 5 dalam bentuk a cos x + b sin x = c
4 cos x + 3 sin x = 5
a= 4
b = 3
c - 5
di ubah ke bentuk K cos (x - A)
k² = a²+b² = 25
k = 5
tan A = b/a = 3/4 = tan 36,7
3 sin x + 4 cos x = 5 menjadi 5 cos (x - 36,7) = 5
cos (x - 36,7) = 5/5 = 1
cos x = 1
cos (x- 36,7) = 1 = cos 0 dan x =36,7
cos (x- 36,7) = 1 = cos 360 dan x = 360 - 36,7 = 323,3
x= (36,7 , 323, 3 )
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jawab
3 sin x + 4 cos x = 5 dalam bentuk a cos x + b sin x = c
4 cos x + 3 sin x = 5
a= 4
b = 3
c - 5
di ubah ke bentuk K cos (x - A)
k² = a²+b² = 25
k = 5
tan A = b/a = 3/4 = tan 36,7
3 sin x + 4 cos x = 5 menjadi 5 cos (x - 36,7) = 5
cos (x - 36,7) = 5/5 = 1
cos x = 1
cos (x- 36,7) = 1 = cos 0 dan x =36,7
cos (x- 36,7) = 1 = cos 360 dan x = 360 - 36,7 = 323,3
x= (36,7 , 323, 3 )