Trigonometric Ratios and Properties

In this video, Tadeu, a math monitor at Descomplica, introduces trigonometric ratios, focusing on sine, cosine, and tangent. He explains the elements of a right triangle, such as the hypotenuse and catheti, and how these relate to angles alpha and beta. The video covers the definitions of trigonometric ratios and provides examples using notable angles like 30, 45, and 60 degrees. Tadeu also shares a mnemonic song to help memorize these values. The video concludes with a reminder to download a mental map and subscribe for more educational content.

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

• Hypotenuse

• Adjacent

• Opposite

• Base

In a right triangle, what do we call the side that is next to the angle we are considering?

• Hypotenuse

• Base

• Adjacent

• Opposite

If we are considering angle beta in a right triangle, which side is opposite to it?

• Hypotenuse

• Opposite to beta

• Adjacent to alpha

• Opposite to alpha

What is the ratio of the opposite side to the hypotenuse called?

• Secant

• Sine

• Tangent

• Cosine

What is the ratio of the adjacent side to the hypotenuse known as?

• Sine

• Tangent

• Cosine

• Secant

What is the ratio of the opposite side to the adjacent side called?

• Tangent

• Sine

• Secant

• Cosine

What is the sine of 30 degrees?

• 1

• √2/2

• √3/2

• 1/2

What is the cosine of 60 degrees?

• √3/2

• √2/2

• 1

• 1/2

What is the tangent of 45 degrees?

• 1/√3

• √3

• 0

• 1

Where can you find additional resources and a mental map for this lesson?

• In the video description

• In the comments section

• On the main website

• In the next video