Question

if a vector b vector and c vector is a triangle then what is the value of c vector if
a=3
b=4
and angle =60 degree

Answer 1

c vector = √3^2+4^2+2(3)(4)cos60
c vector = √9+16+24(1÷2)
c vector = √25+12
c vector = √37

Answer 2

if they form triangle so their resultant vector is abcosthita which is 3*4*cos(90-60)=6