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Applied maths help urgent

r= cos(pheta) = sin(pheta) pheta
1) let x=(1,0) and y=(0,1) v1=-4x+0y v2=2x-7y
determine unit vector r where r = sin pheta + cos pheta and pheta= -sin pheta + cos pheta r(vector)=r*rmodlus

1ii) r(t) = 5tx +(3t^2-t)y determine polar coordinate unit vectors r and pheta

1iii) v(t) = 5x+ (6t-1)y determine v as a linear combination of r and theta calculated in 1ii)
(edited 9 years ago)

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