Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
2 Answers
- Anonymous9 years agoFavorite Answer
k = (cos 2x)/(sin x - cos x)
lim x → ¼ π
misalkan x + y = ¼ π
k = (cos 2(¼ π - y))/(sin (¼ π - y) - cos (¼ π - y))
lim y → 0
k = (cos (½ π - 2y))/(√2 cos (¼ π - y - ¾ π))
lim y → 0
k = (sin 2y)/(√2 cos (½ π + y))
lim y → 0
k = -(sin 2y)/(√2 sin y)
lim y → 0
k = -(sin 2y)/(2y) * (y/sin y) * √2
lim y → 0
k = -1 * 1 * √2
k = -√2
- AdhelLv 79 years ago
aku anggap 45 itu 45 derajat bisa juga ditulis Ï/4
maka
lim xâÏ/4 (cos 2x )/(sin x - cos x)
lim xâÏ/4 (cos²x - sin²x)/(sin x - cos x) faktorkan
lim xâÏ/4 ((cos x+sin x)(cos x-sin x))/(sin x - cos x) corat coret
lim xâÏ/4 (cos x+sin x)/-1
(2/â2)/(-1) = -â2
