The video tutorial explores the origins and meanings of basic trigonometric ratios: sine, cosine, and tangent. It begins with an introduction to trigonometric ratios, followed by a detailed explanation of sine, including its graphical representation as a sinusoidal curve. The tutorial then delves into cosine, explaining its relationship with sine as a complement and its significance in right-angle triangles. The video concludes with a discussion on how cosine relates to triangle properties, providing a comprehensive understanding of these fundamental trigonometric concepts.

What are the basic trigonometric ratios discussed in the video?

• Sine, Cosine, Tangent, Cotangent

• Sine, Secant, Cosecant, Cotangent

• Sine, Cosine, Cosecant, Cotangent

• Sine, Cosine, Tangent, Secant

What does the word 'sine' originate from?

• A word meaning 'line'

• A word meaning 'angle'

• A word meaning 'curve'

• A word meaning 'straight'

What shape is formed when plotting sine values against angles?

• Parabolic

• Sinusoidal

• Exponential

• Linear

What does the 'co' in cosine stand for?

• Coordinate

• Curve

• Constant

• Complement

How is the cosine of an angle related to its complement?

• It is the same as the sine of the angle

• It is the same as the tangent of the angle

• It is the same as the sine of the complement

• It is the same as the cosine of the angle

What is the sum of an angle and its complement?

• 45 degrees

• 360 degrees

• 90 degrees

• 180 degrees

In a right triangle, what is the relationship between sine and cosine of complementary angles?

• They are equal

• They are inverses

• They are complements

• They are unrelated

What is the traditional name for the side opposite the angle in a right triangle?

• Hypotenuse

• Complement

• Adjacent

• Opposite

What is the formula for sine in a right triangle?

• Hypotenuse/Opposite

• Opposite/Hypotenuse

• Adjacent/Opposite

• Adjacent/Hypotenuse

What trigonometric ratio is introduced at the end of the video?

• Cosecant

• Tangent

• Cotangent

• Secant