In any , prove the following:

Answer:

Answer:

Question 3: The sides of a triangle are , show that: .

Answer:

Question 4: In , if , find .

Answer:

Question 5:

Answer:

Question 6:

Answer:

Question 7:

Answer:

Question 8:

Answer:

Hence proved.

Answer:

Question 10:

Answer:

In , we have

Question 11:

Answer:

Answer:

Hence proved.

Answer:

Question 14: In prove that

Answer:

Answer:

Let

Adding all the three

or

Question 16: In any , if , prove that

Answer:

Now

Hence proved.

Answer:

This means either

Hence one of the angles is . Therefore the triangle is a right angled triangle.

Answer:

Using sine rule,

Now

the triangle is Isosceles.

Question 19: Two ships leave a port at the same time. One goes km/hr in the direction of and the other travels km/hr in the direction of . Find the distance between the ships at the end of hrs.

Answer:

Let be the position of two ships at the end of hours.

Using cosine formula in