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