jawabannya D
-->cos-30 -sin-30
sin-30 cos-30
---> 1/2√3(tidak pakai '-' karna kalo cos-α(sudutnya)=cos α) 1/2
-1/2 1/2√3
→1/2√3.2(titik p) 1/2.1
-1/2.2 1/2√3.1
→ √3 1/2
-1 1/2√3
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jawabannya D
-->cos-30 -sin-30
sin-30 cos-30
---> 1/2√3(tidak pakai '-' karna kalo cos-α(sudutnya)=cos α) 1/2
-1/2 1/2√3
→1/2√3.2(titik p) 1/2.1
-1/2.2 1/2√3.1
→ √3 1/2
-1 1/2√3