For the unit circle triangle, use the arcsin and arccos functions as required to determine θ to two decimal places, then use this 2-place decimal θ and the sin or cos function to determine x or y to 2 decimal places. For this chart, all the y values are positive, so all the values for θ<180∘. However, some x values are negative (lower triangle). When x is negative, θ>90∘. Take care to read the sign of x. Your calculator will give you the wrong answer for the 4th problem. You will need to calculate the mirror image of the angle. Draw a sketch to help you.

For the unit circle triangle, use the arcsin and arccos functions as required to determine θ to two decimal places, then use this 2-place decimal θ and the sin or cos function to determine x or y to 2 decimal places. For this chart, all the y values are positive, so all the values for θ<180∘. However, some x values are negative (lower triangle). When x is negative, θ>90∘. Take care to read the sign of x. Your calculator will give you the wrong answer for the 4th problem. You will need to calculate the mirror image of the angle. Draw a sketch to help you.

PREALGEBRA

15th Edition

ISBN:9781938168994

Author:OpenStax

Publisher:OpenStax

Chapter11: Graphs

Section11.1: Use The Rectangular Coordinate System

Problem 11.7TI: Plot each point: (4,-3) (4,3) (4,3) (-4,3)

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Problem 4: For the unit circle triangle, use the arcsin and arccos functions as required to determine θ to two decimal places, then use this 2-place decimal θ and the sin or cos function to determine x or y to 2 decimal places. For this chart, all the y values are positive, so all the values for θ<180∘. However, some x values are negative (lower triangle). When x is negative, θ>90∘. Take care to read the sign of x. Your calculator will give you the wrong answer for the 4th problem. You will need to calculate the mirror image of the angle. Draw a sketch to help you.