Finding Trig Values with the Left Hand Trick

The video tutorial introduces the left hand trick as a method to easily memorize trigonometric values on the unit circle. The instructor explains how each finger on the left hand represents a specific angle, and how to use this representation to calculate sine and cosine values. Through various examples, the video demonstrates the application of the trick for different angles, including those not in the first quadrant. The tutorial concludes with tips for mastering the unit circle and emphasizes the importance of understanding trigonometric connections.

What is the primary purpose of the left hand trick in trigonometry?

• To simplify the memorization of trigonometric values

• To calculate the area of a circle

• To measure angles precisely

• To solve algebraic equations

Which finger represents the angle of 90 degrees or PI/2?

• Thumb

• Index finger

• Middle finger

• Pinky

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CCSS.HSF.TF.A.2

How do you determine the cosine value using the left hand trick?

• Count fingers to the left of the folded finger

• Divide the number of fingers by 2

• Count fingers to the right of the folded finger

• Multiply the number of fingers by 2

Tags

CCSS.HSF.TF.A.2

What is the cosine of PI over 3 according to the left hand trick?

• Square root of 2 over 2

• 0

• Square root of 3 over 2

• 1/2

Tags

CCSS.HSF.TF.A.2

How do you find the sine value of an angle using the left hand trick?

• Count fingers to the left of the folded finger

• Multiply the number of fingers by 2

• Divide the number of fingers by 2

• Count fingers to the right of the folded finger

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CCSS.HSG.SRT.C.7

What is the sine of PI over 6 using the left hand trick?

• 1/2

• 0

• Square root of 2 over 2

• Square root of 3 over 2

Tags

CCSS.HSF.TF.A.2

How is the tangent of an angle calculated using the left hand trick?

• By subtracting cosine value from sine value

• By multiplying sine and cosine values

• By dividing sine value by cosine value

• By adding sine and cosine values

Tags

CCSS.HSG.SRT.C.6

What is the cosine value of 2 PI over 3 using the left hand trick?

• Square root of 3 over 2

• 1/2

• -1/2

• 0

Tags

CCSS.HSF.TF.A.2

What does the cosecant of an angle represent in relation to sine?

• The reciprocal of sine

• The square of sine

• The square root of sine

• The double of sine

Tags

CCSS.HSG.SRT.C.6

What is the value of cosecant of negative 5 PI over 6?

• -2

• 2

• -1/2

• 1/2

Tags

CCSS.HSF.TF.A.2