In is the midpoint of and is the midpoint of If is equilateral of side length equal to unity, then the value of is (where represents greatest integer function) __________ |

In is the midpoint of and is the midpoint of If is equilateral of side length equal to unity, then the value of is (where represents greatest integer function) __________ |

1 Answer

127 votes

**(6)**

We have

is isosceles

and

Since , by applying Cosine rule in we get

127 votes

127