Trigonometry

posted by .

A=30 degrees, a=9 and b=8. Find the missing sides/angles. I did cos39=x/8 and reduced that to 8cos39=x. I got 6.92. But that's not a valid answer, so I can't go from there. What did I do wrong? Can you show me how to get the other answers as well, please?

  • Trigonometry -

    Law of sines:

    a/SinA = b/SinB
    solve for B from that.
    Then
    solve for C knowing A and B, and the sum of angles is 180
    Then, find c with the law of sines, or law of cosines.

  • Trigonometry -

    If the sine of an angle is 3/5 and the angle is not in quadrant 1, what are the remaining five trigonometric values for that angle?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math - Geometry

    Two right triangles are touching at the tips. The left triangle has the 90 degree angle to the bottom left, and 33 degrees on the bottom right. Based on this info, the other angle is 57 degrees. The right triangle has the right angle …
  2. geometry

    I got this problem wrong on a test and i want to know how to fix it. In triangle ABC, angle A is 20 degrees and side AC is 7.89 units, find the other sides and angles
  3. geometry

    find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct?
  4. geometry

    find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct?
  5. Trigonometry

    A triangle has two angles, one 90 degrees, the other (between adjacent and hypotamuse) 26 degrees, and a hypotamuse of 10ft. Find the opposite side's length. Hint: use sine. I think I'm supposed to do 10(sine26), but the answer isn't …
  6. Cosine Law

    Find all missing sides/angles. Round each answer to the nearest unit. Angles/sides ABC (left to right) 1) Angle c= 70 deg side b= 28 yd side c= 26 yd 2) Side a= 18 cm Side b= 24 cm Side c= 28 cm
  7. Math

    Four of the angles of a pentagon measure 85 degrees, 110 degrees, 135 degrees, and 95 degrees. Find the measure of the missing angle. A. 115 degrees B. 95 degrees C. 135 degrees D. 85 degrees Is the answer D?
  8. Math

    What's the value of the missing angle *picture of a triangle and square put together which basically makes a hexagon. angles are 90 degrees, 90 degrees, 130 degrees, 130 degrees. I have to find the last angle.* A. 50 degrees B. 60 …
  9. Geometry

    31.Identify the Hypothesis of the statement below. If you are riding on a train, then it will stop at every station on the line. A.You are riding on a train B.It will stop at every station on the line C.You are not riding on a train …
  10. math

    List the sides of triangle ΔMNP in ascending order (shortest to longest) if: m∠M = 64°, m∠N = 48°, for this one i am not sure if your supposed to find the third angle and or the third side can you guys explain and show me the …

More Similar Questions