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.

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter6: Fractions

Section6.1: Simplifying Fractions

Problem 37WE

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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.