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What is the cos (45) in exact form? √3/2 1/2 √2/2 √π/2 -1 -1 1 45° 1 90 + θ 180 - θ 180 + θ 360 - θ How do you find the circular angle in the 2nd quadrant, given the reference angle, θ? -1 θ° -1 1 1 90 + θ 180 - θ 180 + θ How do you find the circular angle in the 3rd quadrant, given the reference angle, θ? 360 - θ -1 θ° -1 1 1 3π 4 What number of radians is equivalent to 240° ? 4π 3 3π 2 2π 3 -1 θ° -1 1 1 Drag each radian measure to it's position on the unit circle. π ? ? -1 θ° -1 1 3π 2 ? π 2 ? ? ? 1 2π ? 0 ? ? ? All reference angles are π/3radians. √3 means square root of 3 (-cos π/3, -sin π/3) ? (cos 2π/3, sin 2π/3) ? Below are different forms that can name these four points. Drag each point below to its equivalent position on the graph. -1 π/3 π/3 -1 1 π/3 π/3 (1/2,√3/2) ? (cos 300°, -sin 60°) ? 1 2 -2 π -π This is a portion of the graph of y = sin x. Drag the values below to the corresponding position, indicatedby an arrow, on the graph. Note: the grid indicates units. Notice π is a bit past 3. (y-value) √3/2 ? -1 2 π 3 (x-value) 2π 3 ? (x-value) 7π 6 ? 2 -2 π -π This is a portion of the graph of y = sin x. Drag the values below to the corresponding position, indicatedby an arrow, on the graph. Note: the grid indicates units. Notice π is a bit past 3. ( ) (point) - π , 1 2 ? -1 2 ( ) π 3 (point) π , 1 2 ? ( ) (point) π , 0 ? ( ) (point) 3π , -1 2 ? |