What is the value of sin(-60°)? Trigonometry 1 Answer Chirag Mehta Jan 8, 2018 -sqrt3 /2 Explanation: We know that color (red)(sin(360-theta)=-sin theta) Also We can subtract 2pi or 360° from the angle , it can be clearly seen that 180° and 540° overlap each other. Now we get sin (-theta)=-sin (theta)=-sin(60°)=-sqrt3 /2 Answer link Related questions How do I determine the molecular shape of a molecule? What is the lewis structure for co2? What is the lewis structure for hcn? How is vsepr used to classify molecules? What are the units used for the ideal gas law? How does Charle's law relate to breathing? What is the ideal gas law constant? How do you calculate the ideal gas law constant? How do you find density in the ideal gas law? Does ideal gas law apply to liquids? Impact of this question 1098 views around the world You can reuse this answer Creative Commons License