PUSTAKA

Sinaga, Bornok, dkk. Matematika untuk SMA/SMK/MA Kelas X. 2017. Jakarta: Balitbang Kemendikbud RI.

https://www.google.com/search? q=trigonometri&safe=strict&sxsrf=ALeKk03MLSVYNuHipNH5WFCSTguPC50Gog:1592487300952&source=lnms&tbm=isch&sa=X&ved=2ahUKEwj-pIe_vYvqAhUTbn0KHWwJDfMQ_AUoAXoECBAQAw&biw=1366&bih=656#imgrc=Ew31O7dGCX5ZDM

https://id.wikipedia.org/wiki/Trigonometri

https://upload.wikimedia.org/wikipedia/commons/9/9d/Circle-trig6.svg

http://umikulsumsmkn1clp.blogspot.com/2017/02/perbandingan-trigonometri-sudut-di_4.html

https://blog.ruangguru.com/memahami-fungsi-trigonometri-sederhana

https://sumberbelajar.seamolec.org/Media/Dokumen/59c1c6b6865eacac04e3cd2a/027edafe54e94886c103a65597639a11.pdf