Understanding the Sum Identity for Sine

What is the purpose of using the sum identity for sine in this video?

• To find the tangent of 48 degrees

• To calculate the sine of 48 degrees

• To find the sine of 90 degrees

• To determine the cosine of 48 degrees

Which two angles are used in the video to apply the sum identity for sine?

• 20 degrees and 28 degrees

• 45 degrees and 3 degrees

• 60 degrees and 28 degrees

• 30 degrees and 18 degrees

What is the relationship between the cosine of an angle and the sine of its complement?

• They are unrelated

• They are opposites

• They are reciprocals

• They are equal

What is the exact value of the sine of 48 degrees as calculated in the video?

• A complex number

• An irrational number

• A rational number

• An integer

How is the accuracy of the calculated sine of 48 degrees verified in the video?

• By using a different identity

• By measuring with a protractor

• By using a calculator to check the inverse sine

• By comparing with a table of values