sonasultananasirah
4. tan x = p tan x = , cos x = , sin x = berarti : sisi depan = p sisi samping = 1 sisi miring = ( gunakan rumus pitagoras)
a. sin x = = b. cos x = = c. sin (90 - x) = sin 90.cos x - cos 90.sin x = 1 . - 0 . = d. cos (180 - x) = cos 180 . cos x + sin 180 . sin x = -1 . + 0 . = -
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sonasultananasirah
maaf y baru kk jawab, baru liat soalny. :) bru itu yg bsa kk jwb, ntar kalo udh ketemu yang nomor 5, nnti kk ksh tau lgi :)
Jadi, cos a = -0,587 , tan a=1,376
tan x = , cos x = , sin x =
berarti :
sisi depan = p
sisi samping = 1
sisi miring = ( gunakan rumus pitagoras)
a. sin x =
=
b. cos x =
=
c. sin (90 - x) = sin 90.cos x - cos 90.sin x
= 1 . - 0 .
=
d. cos (180 - x) = cos 180 . cos x + sin 180 . sin x
= -1 . + 0 .
= -