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Math Help - Five basic Trigonometry Questions (Answer as many as you like)

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    Five basic Trigonometry Questions (Answer as many as you like)

    1. Which of the following is a solution to the equation 2sin^2x+sinx=1
    I. x=30
    II. x=150
    III. x=270

    a)III only
    b)I and III only
    c) II and III only
    d)I, II, III

    2.In triangle ABC, B=65 degrees, b=2 and c=12. How many triangles are possible?

    3. Find sin2942' to four decimal places_

    4. Find sec178'49" to four decimal places

    5.Which of the following statements would give the largest value of theta if theta was less then 90?
    a)7sinTHETA=4
    b)5cosTHETA=2
    c)4tanTHETA=6
    d)8cscTHETA=10


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    What do you think the answers are and why?
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  3. #3
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    Quote Originally Posted by ceroseven View Post
    1. Which of the following is a solution to the equation 2sin^2x+sinx=1
    I. x=30
    II. x=150
    III. x=270

    a)III only
    b)I and III only
    c) II and III only
    d)I, II, III
    Wouldn't it be faster just to put each of those into the equation and see if they satisfy it?

    2.In triangle ABC, B=65 degrees, b=2 and c=12. How many triangles are possible?. Draw a line segment of length 12. At one end of it draw a line at angle 65 degrees. Draw a circle having the other end as a center and radius 2. How many times does the circle intersect the line?
    3. Find sin2942' to four decimal places_

    4. Find sec178'49" to four decimal places
    Don't you have a calculator?

    5.Which of the following statements would give the largest value of theta if theta was less then 90?
    a)7sinTHETA=4
    b)5cosTHETA=2
    c)4tanTHETA=6
    d)8cscTHETA=10
    sin THETA= 4/7, cos THETA = 2/5, tan THETA= 6/4, csc THETA= 10/8. Use your calculator to find each of those and decide which is largest.


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