CCSS.MATH.CONTENT.HSF.TF.A.3(+) Use special triangles to determine geometrically the values of sine, cosine, tangent for π/3, π/4 and π/6, and use the unit circle to express the values of sine, cosine, and tangent for
x, π +
x, and 2π –
x in terms of their values for
x, where
x is any real number.
LTI launch URL
(help)
https://schoolyourself.org/page/lti/sy/trigonometry/trig-45
