Trigonometric Identities - Math is Fun The Trigonometric Identities are equations that are true for Right Angled Triangles (If it isn't a Right Angled Triangle use the Triangle Identities page) Each side of a right triangle has a name: Adjacent is always next to the angle And Opposite is opposite the angle
Trigonometric Identities Cheat Sheet Double Angle Identities sin 2 = 2 sin cos cos 2 = cos2 sin2 cos 2 = 2 cos2 1 cos 2 = 1 2 sin2 2 tan tan 2 =
Trigonometry Cheat Sheet - Symbolab Triple-Angle Identities sin (3x) = −sin3 (x) + 3cos2 (x) sin (x) sin (3x) = −4sin3 (x) + 3sin (x) cos (3x) = cos3 (x) − 3sin2 (x) cos (x)
The 36 Trig Identities You Need to Know - PrepScholar This guide explains the trig identities you should have memorized as well as others you should be aware of We also explain what trig identities are and how you can verify trig identities