Unit 3 - Trigonometric Identities

sin²(x) + cos²(x)

1

tan²(x)

sec²(x) - 1

csc²(x)

cot²(x) + 1

sin(x + y)

sin(x) * cos(y) + cos(x) * sin(y)

sin(x - y)

sin(x) * cos(y) - cos(x) * sin(y)

cos(x + y)

cos(x) * cos(y) - sin(x) * sin(y)

cos(x - y)

cos(x) * cos(y) + sin(x) * sin(y)

sin(2x)

2 * sin(x) * cos(x)

cos(2x)

cos²(x) - sin²(x)

1 / sec(x)

cos(x)

1 / csc(x)

sin(x)

1 / cot(x)

tan(x)

csc²(x)

csc(x) / sin(x)

sec²(x)

sec(x) / cos(x)