12. You are given the triangle ABC with A =61°, b = 8 cm. and c=5...
11. Write cos 3u - cos Tu as a product of trigonometric functions. Write down the steps to your answer. 12. You are given the triangle ABC with A =61°, b = 8 cm. and c=5 cm. (a) Calculate the unknown length of its side and the unknown measures of its angles. Write down the steps to your answers. (b) What is the area of the triangle?
13. You are given the triangle ABC with a=9 inches, b=11 inches, and c=14 inches. Determine the measures, in degrees, of all its three angles to the nearest degree. Write down the steps to your answers.
3. You are given the triangles ABC with A=240,b=10 cm and c=15 cm. (a) Use the law of cosines to determine the unknown length a. Round off your answer to 1 decimal place. Write down the steps leading to your answer. (b) Determine the measure, in degrees, of angles B and C to the nearest degree. Write down the steps leading to your answers.
In △ABC, b = 6 and c = 7. The area of the triangle is 61/3. To the nearest tenth, calculate a 61 and m∠A (in degrees).
Given triangle ABC, if a = 5, b = 8, and angle A = 25°, find angles B and C.
Given triangle ABC, if a = 5, b = 8, and angle A = 25°, find angles B and C.
15. Calculate, to the nearest whole number, the area of triangle ABC with a=8 inches, b=11 inches and c=14 inches. Write down the steps to your answer. 16. Determine the polar coordinates of the point with Cartezian coordinates (-5,-5) 17. Determine a polar form of the complex number 6 - 6
4. In triangle ABC we are given the following: a = 16 cm, b = 20 cm, ZC = 70°. (i) Use the law of cosines to calculate the value of c to the nearest hundredth of a unit of length. (ii) Use the law of sines to calculate the measure of ZA to the nearest degree. (iii) Find the measure of ZB. (iv) Determine whether the given data produce one triangle, two triangles, or no triangle at all. (v)...
Find the area of the triangle ABC a = 345 cm b= 236 cm c=428 cm What is the area of the triangle? [ cm² (Simplify your answer. Type an integer or decimal rounded to the nearest tenth as needed.)
Find the area of the triangle ABC. a = 349 cm b=237 cm c=422 cm What is the area of the triangle? cm² (Simplify your answer. Type an integer or decimal rounded to the nearest tenth as needed.)