trigonometry

posted by .

---I asked this question

Solve the following right triangles:
a. a=117 ft, b=16.35 ft
b. B=8 degrees 29',and a=32.8 ft


Reiny was kind enough to post this reply.


"solving" a triangle involves finding all missing sides and angles, so in
a) you found the sides, but still no angle.
tan B = 16.35/117 = 0.13974
angle B = 7.96°
subtract from 90° to find angle A

b) angle B = 8° 29' = (8+29/60)° = 8.48333°

tan 8.48333° = b/32.8
b= 4.892

now use Pythagoras to find the third side, and subtract angle B from 90 to get angle A

---but i am still having trouble with understanding the question and how the answers she posted were found .If u can explain to me in more details that would be great

  • trigonometry -

    The best tool to solve trigonometry and geometry problems is to draw a diagram. Unless you are very capable of drawing images in your mind, it is always a good idea to draw the figure, label it with all the given information and add more information as you go along.

    This practice will not only help you solve the current problem, but you will, in time, see a pattern that will help you solve future problems.

    Try to draw a right triangle, and label all the information on the figure. Proceed to solve as Reiny suggested. You will have no problem understanding Reiny's solution.

    If you have problems creating the figures, see:

    http://img823.imageshack.us/img823/6568/1295158166.jpg

  • correction -

    There is a mistake in the figure for part a. TanB=... should read tan-1....

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. trigonometry

    Solve the following right triangles: a. a=117 ft, b=16.35 ft b. B=8 degrees 29',and a=32.8 ft for a. got 118.14 by Applying the Pythagorean Theorem a^2 + b^2 = c^2. can you show me the steps of how to solve b.
  3. Trig

    Does this result in no triangle, 1 or 2 triangles?
  4. trigonometry

    Umm..Im having trouble with solving word problems that involves application of solving right triangles, and also in bearing.. Well, particularly in the drawing/sketching, you know when I don't even know that the triangle described …
  5. trigonometry

    draw a triangle that maps their route. label the lengths and angles. is hjb a right triangle?
  6. Math question/help please!

    Please somebody help me with this question, I don’t really get it: The triangles are shown congruent. Find the measure of angle P. MLK is congruent to RQP. A. 43 degrees B. 32 degrees C. 105 degrees D. 37.5 degrees Triangle 1 measures: …
  7. Math question/help please!

    Please somebody help me with this question, I don’t really get it: The triangles are shown congruent. Find the measure of angle P. MLK is congruent to RQP. A. 43 degrees B. 32 degrees C. 105 degrees D. 37.5 degrees Triangle 1 measures: …
  8. Math question/help please!

    Please somebody help me with this question, I don’t really get it: The triangles are shown congruent. Find the measure of angle P. MLK is congruent to RQP. A. 43 degrees B. 32 degrees C. 105 degrees D. 37.5 degrees Triangle 1 measures: …
  9. Math, please help me.

    This is the last question of my quiz, I need help with it. I need just one question answered. Question: The angles opposite the congruent sides of an isosceles triangle are congruent. Find the value of x in the triangle. Show all your …
  10. Math

    On a test I was given 2 triangles. One triangle gave measurements of all three sides as 2, 4, and 5. The next triangle had sides given 4 and 8 and it asked what the third side should be if the triangles were perpendicular. How would …

More Similar Questions