{"id":1185,"date":"2025-11-29T21:57:57","date_gmt":"2025-11-29T12:57:57","guid":{"rendered":"http:\/\/saegil-lab.kr\/?p=1185"},"modified":"2026-02-18T13:38:03","modified_gmt":"2026-02-18T04:38:03","slug":"ya-sin-x-b-cos-x%ec%9d%98-%ed%95%a9%ec%84%b1","status":"publish","type":"post","link":"https:\/\/saegil-lab.kr\/?p=1185","title":{"rendered":"\"y=a \sin x + b \cos x\"\uc758 \ud569\uc131"},"content":{"rendered":"\n

\"y= a \sin x + b \cos x\"\uc640 \uac19\uc740 \ud615\ud0dc\ub294 \ud55c \uac1c\uc758 \uc0bc\uac01\ud568\uc218\ub85c \ud569\uc131\ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n

  <\/span>   <\/span>\"\begin{equation*}\begin{aligned}y &= a \sin x + b \cos x \\&= \sqrt{a^2 + b^2} \left( \frac{a}{\sqrt{a^2 + b^2}} \sin x + \frac{b}{\sqrt{a^2 + b^2}} \cos x \right)\end{aligned}\end{equation*}\"<\/p><\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

\"\tan \alpha = \frac{b}{a}\"\ub77c\uace0 \ud558\uba74 \uc704\uc758 \uadf8\ub9bc\uacfc \uac19\uc774 \ube57\ubcc0\uc758 \uae38\uc774\ub294 \"\sqrt{a^2 + b^2}\"\uc774 \ub418\uace0 \"\cos \alpha = \frac{a}{\sqrt{a^2 + b^2}}\", \"\sin \alpha = \frac{b}{\sqrt{a^2 + b^2}}\"\uc774 \ub418\ubbc0\ub85c \ub2e4\uc74c\uacfc \uac19\uc774 \ubcc0\ud615\ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n

  <\/span>   <\/span>\"\begin{equation*}\begin{aligned}y &= \sqrt{a^2 + b^2 } (\sin x \cos \alpha + \cos x \sin \alpha) \\&= \sqrt{a^2 + b^2} \sin(x + \alpha) \end{aligned}\end{equation*}\"<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

\uc640 \uac19\uc740 \ud615\ud0dc\ub294 \ud55c \uac1c\uc758 \uc0bc\uac01\ud568\uc218\ub85c \ud569\uc131\ud560 \uc218 \uc788\ub2e4.     \ub77c\uace0 \ud558\uba74 \uc704\uc758 \uadf8\ub9bc\uacfc \uac19\uc774 \ube57\ubcc0\uc758 \uae38\uc774\ub294 \uc774 \ub418\uace0 , \uc774 \ub418\ubbc0\ub85c \ub2e4\uc74c\uacfc \uac19\uc774 \ubcc0\ud615\ud560 \uc218 \uc788\ub2e4.    <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-1185","post","type-post","status-publish","format-standard","hentry","category-13"],"_links":{"self":[{"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=\/wp\/v2\/posts\/1185","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1185"}],"version-history":[{"count":11,"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=\/wp\/v2\/posts\/1185\/revisions"}],"predecessor-version":[{"id":1212,"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=\/wp\/v2\/posts\/1185\/revisions\/1212"}],"wp:attachment":[{"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1185"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1185"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/saegil-lab.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}