Most schools implement blended learning modality to deliver quality education amidst the COVID-19 pandemic. This study determined the attitudes and performance in Trigonometry using blended learning among college students in Biliran Province State University, school year 2021-2022 amidst COVID-19 pandemic as basis for an action plan. It employed a descriptive-correlational research design to gather data regarding the attitudes and performance of the 34 freshman college Education students who are enrolled in Trigonometry. They responded to two adopted research questionnaires the Fennema-Sherman Attitudine Scale and the Trigonometry Proficiency Test. The collected data were treated using frequency, simple percentage, rank, weighted mean, standard deviation, Chi-square test of independence, and ANOVA. The findings revealed that students are less proficient in Trigonometry test using blended learning approach despite of their positive attitudes in Trigonometry. Also, the study shows that age and gender of the students do not have relationships with their attitudes and performance in Trigonometry. The study concluded that students need to improve their learning in the subject for these are prerequisites in higher mathematics.The researcher recommends that the action plan should be implemented, monitored and evaluated to improve the performance of students in Trigonometry

Keywords : Teaching Mathematics, Trigonometry, performance, attitudes, descriptive method, Philippines