Give answers correct to 3 significant figures.
1.Use the sine rule to find the side or angle marked by a letter.
(a) |
(b) |
2. Use the cosine rule to find a and b.
(a) |
(b) |
3. Find the area of the triangles.
(a) |
(b) |
4. Find the lengths of the sides marked by letters.
(a) |
(b) |
5. Find the size of the angles marked by letters.
(a) |
(b) |
6. Find the sizes of all of the unmarked sides and interior angles of the triangles.
(a) |
(b) |
7.
(a) Find the area of the triangle ABC |
(b) Find the value of x, if the area of the triangle is 15 cm2. |