Sine rule, cosine rule and area of a triangle

Question 1 of 10

In triangle ABC, a = 12 cm, B = 45° and C = 60°. Find b, to 1 decimal place.

Question 2 of 10

If cos A is negative, angle A is

Question 3 of 10

Find the area of a triangle with sides 7 cm and 4 cm and included angle 70°, to 1 decimal place.

Question 4 of 10

In triangle ABC, b = 8 cm, c = 8 cm and A = 70°. Find a, to 1 decimal place.

Question 5 of 10

The area of a triangle with sides 12 cm and 5 cm and an included angle of 30° is ___ cm².

Question 6 of 10

The largest side is opposite the smallest angle.

Question 7 of 10

Find the area of a triangle with sides 10 cm and 11 cm and included angle 70°, to 1 decimal place.

Question 8 of 10

The area of a triangle with sides 10 cm and 6 cm and an included angle of 30° is ___ cm².

Question 9 of 10

The area of a triangle with sides 12 cm and 14 cm and an included angle of 30° is ___ cm².

Question 10 of 10

The sine rule states that