삼각법
주기성을 이용해 sin(theta - 360°) 간단히 하기
각도에서 360도를 빼도 사인이 변하지 않는 이유를 보고, sin(theta - 360°)를 같은 함수 sin(theta)로 간단히 하세요.
Problem
Which of the following functions is equal to ?
Step 1: Use the Periodicity of Sine
The sine function has a period of , meaning
for any integer .
Step 2: Substitute
Since
we have
Step 3: Final Answer
Therefore, the function equal to is
개념
Unit Circle and Radian Measure
Extending trigonometric ratios beyond acute angles to any angle measure using the unit circle. The coordinates of the point on the circle are . Radian measure connects angle size to arc length. Includes negative angles, angles greater than , and exact values for special angles in all four quadrants.
더 많은 동영상
© 2026 Mathos. 모든 권리 보유



