This is gr 12 calculus btw
I need helping in filling in the blanks/
-the angle formed at the centre of the circle by two radii is the _______ angle.
-cos delta, sin delta, tan delta are known as the ___________trigonometric ration
-cos (pie/2 - x)=sinx is an example of a ________ identity.
To fill in the blanks:
1. The angle formed at the center of the circle by two radii is the **central angle**. This angle is formed by joining two radii of the circle and is measured in degrees or radians.
2. The trigonometric ratios cos delta, sin delta, and tan delta are known as the **circular trigonometric ratios**. These ratios are defined using a unit circle, where the angle delta (measured in radians) is formed between the positive x-axis and the terminal side of the angle.
3. The equation cos(pi/2 - x) = sinx is an example of a **trigonometric identity**. Specifically, it represents the **co-function identity** for sine and cosine. Co-function identities express the relationship between sine and cosine of complementary angles. In this case, the angle (pi/2 - x) is called the complementary angle to x, and the identity states that the cosine of the complementary angle is equal to the sine of the original angle.