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All Journal Jurnal Media Pertanian Tautologi: Journal of Mathematics Education
Alamsyah, Fahri
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Agriculture, Biological Sciences & Forestry Education Languange, Linguistic, Communication & Media Mathematics

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Analisis Kesalahan Dalam Menyelesaikan Soal Trigonometri Pada Siswa SMAN 1 Parepare Alamsyah, Fahri
Tautologi: Journal of Mathematics Education Vol. 1 No. 1 (2023): Tautologi
Publisher : Prodi Pendidikan Matematika Fakultas Keguruan dan Ilmu Pendidikan (FKIP) Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/tautologi.v1i1.1913

Abstract

This research is a qualitative descriptive research with the aim of determining errors in solving trigonometry problems in class XI social studies 3 students of SMA Negeri 1 Parepare. The subjects of this study were class XI students, especially in class XI social studies 3 and 3 subjects were selected for in-depth analysis related to errors experienced in solving trigonometric problems. Data collection techniques use test-giving techniques and interview techniques. Students are given a test in the form of trigonometry questions. Before use, the question is first tested for validation.After obtaining the research data, the researcher analyzed the research data using triangulation. Data engineering is carried out with the stages of data reduction, data presentation and data verification. The results of this study continue the mistakes experienced by students in solving trigonometry problems including misunderstanding concepts, principle errors and technical errors. The causative factor is the lack of interest in learning mathematics so that it is less thorough in doing the problem, as well as factors from within the student himself and the level of understanding of concepts and prerequisites is lacking.
Respon Toksisitas Racun Kontak Ekstrak Daun Kipahit Tithonia diversifolia Terhadap Larva Fall Armyworm Spodoptera frugiperda J. E. Smith. (Lepidoptera : Noctuidae) Dhika, Dian; Pulungan, Nurliana; Yulianita, Siska; Alamsyah, Fahri; Baldan Panjahitan, Faisal Azhari
Jurnal Media Pertanian Vol 11, No 1 (2026): April
Publisher : Universitas Batanghari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jagro.v11i1.300

Abstract

Fall Armyworm (FAW) or armyworm (Spodoptera frugiperda J. E. Smith) is an insect native to the United States that is invasive to Indonesia. Pest control can be done with natural/biological compounds derived from plants which are an alternative to chemical insecticides. The purpose of this study was to observe the toxicity response of contact poison extract of Tithonia diversifolia kipahit leaves against S. frugiperda larvae. This study was conducted in the laboratory of the Faculty of Agriculture, Islamic University of North Sumatra, Jl. Karya Wisata Gedung Johor. Medan Johor District, Medan City, North Sumatra, with an altitude of ± 25 m above sea level (meters above sea level) with flat topography. This research was conducted from June 20, 2025 to August 16, 2025. This research used a non-factorial Completely Randomized Design using several treatments, namely k0: control, k1: 0.1%, k2: 0.2%, k3: 0.3%, k4: 0.4%, and k5: 0.5%. By using Analysis using IBM SPSS Statistic 20. Observed parameters S. frugiperda pest level, Lethal concentration LC50 and Lethal Time LT50. The results showed that the administration of kipahit leaf extract (T. diversifolia) using contact poison application in this study had a significant effect on the mortality of S. frugiperda larvae, the highest mortality was at a concentration of k5 (0.5%) which was 77.50%, the higher the concentration of contact poison given, the faster the mortality process of S. frugiperda larvae.
Co-Authors Baldan Panjahitan, Faisal Azhari Dhika, Dian Pulungan, Nurliana Yulianita, Siska