If in a triangle ABC, a-25, b=16, c=9 then tan (A/2) is?

Question

Mathematics

Duncan Castillo

27 January, 15:53

If in a triangle ABC, a-25, b=16, c=9 then tan (A/2) is?

+1

Answers (1)

Know the Answer?

Alexzander Combs · Answer 1

We have the following givens:

a=25

b=16

c=9

We can make use of the Laws of Cosines in solving the angle A such as:

cos A = (b²+c²-a²) / 2bc

cos A = ((16) ²+9² - (25) ²) / 1*16*9

A=180°

tan (A/2) = tan (180/2)