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

  1. 👍 0
  2. 👎 0
  3. 👁 95
asked by Jane
  1. sinB/b = sinC/c
    that will get you B
    Then A+B+C=180 gets you A

    a^2 = b^2+c^2 - 2bc cosA
    gets you A. Then,
    b/sinB = c/sinC = a/sinA gets you A and B

    1. 👍 0
    2. 👎 0
    posted by Steve

Respond to this Question

First Name

Your Response

Similar Questions

  1. geometry

    In triangle ABC, angle C is a right angle. Find the remaining sides and angles. Round your answer to the nearest tenth. angle B = 52 degrees, b = 10

    asked by Anonymous on December 23, 2011
  2. Mathematics

    Are the figures below similar? Why or why not?(Use the link below. You cannot directly copy then paste it to another tab, you need to delete the spaces in the link then enter into the website showing the picture to answer this

    asked by Derpy Hooves on November 21, 2012
  3. Algebra 2

    In triangle ABC,

    asked by Veronika on February 23, 2016
  4. geometry

    In triangle ABC, angle B is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. a = 3, c = 3

    asked by Anonymous on December 23, 2011
  5. ALGEBRA 2

    In triangle ABC , angle C is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. Show your work

    asked by SAM on November 28, 2014
  6. Geometry

    I had to fill out a chart stating the properties of certine shapes(parallelograms). Some of them i put to many properties please tell me witch ones i have wrong. The properties to select from: 1-Opposite sides are parallel (both

    asked by Roxxxxxxxxx on April 26, 2007
  7. maths - shapes

    Can you name these quadrilaterals? a) All sides are the same length, opposite sides are parallel, angles are not 90 degrees. b) Two pairs of touching sides are the same length. The diagonals meet at right angles. Opposite sides

    asked by janey on April 8, 2009
  8. Maths

    In a triangle with angles α,β,γ and opposite sides a, b, c you are given: α=35°, β=100°, b=40. Find all missing lengths and angles as well as the area correct to 1 decimal place.

    asked by Michael on November 18, 2016
  9. construct a triangle

    How can I construct a triangle ABC with vertices A(-4,2), B(4,3), C(1,-3). what are the angles in order from least measure to greatest measure Since you will have to use trigonometry to find the angles, surely you must know how to

    asked by Sam on August 8, 2007
  10. Geometry..

    Given: A(3,-1), B(5,2), C(-2,0), P(-3,4), Q(-5,-3), R(-6,2). Prove: angles ABC and RPQ are congruent by completing the paragraph proof. AB=RP=13, BC=(?)=53, and CA=QR=26. So segment AB is congruent to (?), segments BC and PQ are

    asked by Wendell on July 26, 2011

More Similar Questions