Asked by benjieo
In a triangle PQR. Q=8cm , R=6cm . Cosp=1/12.calculatethe value of p
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Answered by
MathMate
I 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.
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.
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