Please solve questions A, and B Note: question B is in the bottom WUIb Begin Dat
ID: 1405598 • Letter: P
Question
Please solve questions A, and B Note: question B is in the bottom WUIb Begin Date: y1/20IS 12UU:UU AM- Due Date:9/4/2015 11:59:00 PM End Date: 12/20/2015 11:59:00 P (10%) Problem 8: Assume you have two vectors, A-9.93.6J and an unknown vector B with length f. 9. >50% Part (a) If the scalar product of these two vectors is A, B = 79, what is the x-component of the vector sin cotanO asinOacos0 atanO acotan0 sinh0 cosh0tanhO cotanhO cosO o Degrees G Submit Hint I give up! Feedback:-5% deduction per feedback. Hints: 2% deduction per hint. Hints remaining:- 50% Part (b) What is the y-component of the vector B?Explanation / Answer
let vector B be given by B=x i + y j
given that sqrt(x^2+y^2)=4.9
==> x^2+y^2=24.01...(1)
A.B=7.9
==> 9.9*x+3.6*y=7.9
==> x=-0.3636 *y +0.798
substituting it in equation 1:
0.1322*y^2+0.6368-0.5803*y+y^2=24.01
==> y=4.8071
==> x=-0.3636*4.8071+0.798=-0.95
part B:
y component of vector B is 4.8071