SKIM TRIGONOMETRI PADA JUMLAH DAN SELISIH DUA SUDUT BAGI SISWA KELAS XII SMA KRISTEN 1 SALATIGA

Sari

This research is a qualitative descriptive research that aims to know know trigonometric scheme on the number and difference of two angles for Student Class XII SMA Kristen 1 Salatiga. The sample of this research is XII SMA Kristen 1 Salatiga consisting of 6 students (1 male and 5 female students). The results of this study indicate that there are nine trigonometric schemes on the number and difference of two angles possessed by students in working on trigonometric questions on the number and difference of two angles, that is scheme outlines the sum and difference of the two angles, scheme of application of the phytagoras formula, the scheme outlines with a special angle, the scheme of coherent multiplication on the tangent function, scheme quadrant method, scheme of use of example, two-tier multiplication schemes, the application scheme of identity formula, and scheme distributive properties multiplication against subtraction.