Saturday

October 25, 2014

October 25, 2014

Posted by **benjieo** on Wednesday, May 14, 2014 at 6:40am.

- maths -
**MathMate**, Wednesday, May 14, 2014 at 6:44amI think you mean:

In a triangle PQR. q=8cm , r=6cm . Cos(P)=1/12. Calculate the value of p.

where capital letters mean vertices, lower-case letters mean lengths of sides opposite the corresponding vertex.

Use cosine rule:

p²=q²+r²-2qr(cos(P))

and solve for p.

**Answer this Question**

**Related Questions**

maths-geomtery - draw a scelene triangle ABC with AB=6cm, BC=9cm and CA =8cm. ...

Algebra - In triangle PQR shown, point S (not shown)is on QR between Q and R. ...

geometry - A triangles shows the altitude qt and pm of triangle pqr. If qr=8cm...

Mathematics - What is the perimeter of a triangle of length 6cm, 8cm, 10cm?

geometry - In the diagram below, the length of the legs AC and BC of right ...

Geometry - Determine whether triangle PQR is congruent to triangle STU given the...

math - Use (Triangle) PQR with coordinates P(2, –1), Q(0, 5), and R(–2, 0). ...

Maths - In triangle PQR, |PQ|= 7 cm, |QR|=5 cm and |<QPR|= 43 degrees Find, ...

algebra - How do you find the height of a triangle with one side that is 8cm ...

7th grade math - what is the ratio of a triangle that is 6cm on one side,and ...