Unit Circle ( √3, 1 ) 2 2 ( 1, √3 ) 2 2 ( √2, √2 ) 2 2 30˚ 45˚ 60˚

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Presentation transcript:

Unit Circle ( √3, 1 ) 2 2 ( 1, √3 ) 2 2 ( √2, √2 ) ˚ 45˚ 60˚

Use the Unit Circle to find cos 135 Reference angle: 45 Coordinate: x Sign: - Answer: -√2 2

Use the Unit Circle to find sin 315 Reference angle: 45 Coordinate: y Sign: - Answer: -√2 2

Use the Unit Circle to find sin 180 Reference angle: none Coordinate: y Sign: N/A Answer: 0

Use the Unit Circle to find cos 210 Reference angle: 30 Coordinate: x Sign: - Answer: -√3 2

Use the Unit Circle to find tan 225 Reference angle: 45 Coordinate: y/x Sign: -/- = + Answer: 1

Use the Unit Circle to find sin 120 Reference angle: 60 Coordinate: y Sign: + Answer: √3 2

Use the Unit Circle to find cos 120 Reference angle: 60 Coordinate: x Sign: - Answer: -1 2

Use the Unit Circle to find tan 270 Reference angle: none Coordinate: y/x Sign: N/A Answer: 1 = undefined 0

Use the Unit Circle to find tan 360 Reference angle: none Coordinate: y/x Sign: N/A Answer: 0 = 0 1

Use the Unit Circle to find cos 90 Reference angle: none Coordinate: x Sign: N/A Answer: 0

Use the Unit Circle to find cos 150 Reference angle: 30 Coordinate: x Sign: - Answer: -√3 2

Use the Unit Circle to find cos 330 Reference angle: 30 Coordinate: x Sign: + Answer: √3 2

Use the Unit Circle to find cos 240 Reference angle: 60 Coordinate: x Sign: - Answer: -1 2

Use the Unit Circle to find tan 180 Reference angle: none Coordinate: y/x Sign: N/A Answer: 0 = 0 1

Use the Unit Circle to find tan 135 Reference angle: 45 Coordinate: y/x Sign: +/- = - Answer: -1

Use the Unit Circle to find tan 135 Reference angle: 45 Coordinate: y/x Sign: +/- = - Answer: -1