View Poll Results: I'm in ninth grade... Should I know how to do these problems

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Thread: Hard Trig Questions ( HELP MUCH APPRECIATED!)

  1. #1

    Hard Trig Questions ( HELP MUCH APPRECIATED!)

    1. Ship A leaves Port at noon and sails due South at six knots. B leaves the same port an hour later and sails on a heading of 120 degrees steady as six knots. At 2:00 PM, the bearing from ship a to ship b is ____?

    2. A person flying a kite holds the string 5 ft above the ground. When 200 ft of string has been let out, and the angle of the string above the earth is 61 degrees, a pin falls out of the kite and straight to the ground. The distance in ft that the pin lands from the person flying the kite is closest to ____?

    3. At 3PM standard time, in the sky above Alabama a honey bee heading 095 at 90 MPH and a hornet heading 005 at 90(root 3 mph collided. Both were flying straight; the bearing from the hornet to the bee, right up to the moment they collided would have been ____

    4. An angle of 0 degrees, 0'1.4", when converted to radians is : A. 1.4 x 10^-7 B 1.4 x 10^ -6 C 6.79 x 10 ^ -6 D 1.64 x 10^-3 e. 0.021

    5. If the radius of the earth is 3963 miles , then the earths rotational speed in mi/hr at latitude 61 degrees north (at Anchorage, Alaska) is approximately ______.

    6. .... And, the distance in mi on the surface of the earth from Anchorage to the North Pole is _____.

    7. A man on a dock is pulling in a boat by means of a rope attached to
    the bow of the boat 1 ft above the water and passing through a simple
    puley located on the dock 8 ft above the water. If the boat is
    originally 45 ft fromt he dock, and he pulls in the rope at 2ft/sec,
    what is the angle between the rope and the water after 10 seconds?

    8. How do I prove that [2cos[(3a+4b)/2]cos[(3a-4b)/2] all devided by
    (tan3a+tan4b) equals [cos3acos4b - cos4b(cos4b)]?

    9. [(2sec60tan5a)/(1 + (cos(10a)] * (sin10a/4)] + 1 = sec5a(sec5a). How
    would I prove this?



  2. #2
    Elite Member
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    No matter the grade you are in, if this sort of thing is new to you, it is less likely to qualify as "easy".

    You must draw a picture, whenever you can. Later, you'll have to let go of these pictures. For now, it's okay.

  3. #3
    Quote Originally Posted by tkhunny View Post
    No matter the grade you are in, if this sort of thing is new to you, it is less likely to qualify as "easy".
    I need to make sure my answers are correct
    Last edited by tkhunny; 03-27-2012 at 08:08 AM.

  4. #4
    Elite Member
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    You don't know why you're in this class, do you?

    I do not believe that you do not know how to start your drawing.

    "Ship A leaves Port at noon and sails due South at six knots."

    1) Draw a port. A single point will be fine. Label it "Port".
    2) Decide which direction is South.
    3) Draw a ship (a single point would be fine), due south of the port. Label it "A".
    4) Draw a line segment between the port and the ship. Label this line segment "6 knots"

    Do you REALLY want me to believe that you cannot draw that?

  5. #5
    Elite Member
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    Excellent editing. I am glad that you changed your mind about that. Let's see how you obtained the answer you achieved. If you wander off, someone will help you fix it.

  6. #6
    Elite Member
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    “... mathematics is only the art of saying the same thing in different words” - B. Russell

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