Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 month ago

Math word problems please help me?

How do I get these solutions for 103, and 104? And how? 

Please teach me...

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  • Ash
    Lv 7
    1 month ago

    103. Find angle made by the coordinate with origin

    θ = arctan (0.707/-0.707)

    θ = 315°  or due 45° South-East

    Since the carousal started from due North, the counter clockwise angle made will be 315° - 90°  = 225°  

    As the carousal takes 1 min for 1 revolution or 360°

    For 225° , it will take (1min / 360°)225° = 0.625 min or 37.5 s

    Since the ride lasts 6 min he child will repeat the coordinates after every 1 min

    So the times will be 37.5 s, 97.5 s, 157.5 s, 217.5 s, 277.5 s, 337.5 s

    104. We solve similarly, as 103...

    θ = arctan (-0.866/-0.5)

    θ = 240° or [South 30° West ]

    Since the carousal started from due North, the counter clockwise angle made will be 240° - 90° = 150 °

    As the carousal takes 1 min for 1 revolution or 360°

    For 150° , it will take (1min / 360°)150° = 0.417 min or 25 s

    Since the ride lasts 6 min he child will repeat the coordinates after every 1 min

    So the times will be 25 s, 85 s, 145 s, 205 s, 265 s, 325 s

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