These identities describe the relationship between complementary angles. They show that the sine of an angle is equal to the cosine of its complementary angle, and the same is true for cosine and tangent, and secant and cosecant.
These identities describe the relationship between complementary angles. They show that the sine of an angle is equal to the cosine of its complementary angle, and the same is true for cosine and tangent, and secant and cosecant.