Prove that: [(Â×B)×Ĉ]×Ď+[(Â×Â)×Ď]×¢ +[(Ĉ×Ď) D

Vector  B→B→ has magnitude 7.30 and direction 14.0° below the +x-axis. Vector  C→C→ has x-component Cx = −2.00 and y-component Cy = −6.70. f. What angle does the resultant vector  C→+B→C→+B→  make with the +x-axis in clockwise direction? A positive angle is counterclockwise from the +x-axis. answer in degrees      g. What is the magnitude of  C→−B→C→-B→ ? h. What angle does the vector C→−B→C→-B→  make with the +x-axis in counterclockwise direction? A positive angle is counterclockwise from the +x-axis. i. What is the x-component of  C→−B→C→-B→ ? j. What is the y-component of  C→−B→C→-B→ ?

Find the number of significant figures in each of the following. (a) 61.8 ± 0.3   (b) 3.86 ✕ 109   (c) 2.80000 ✕ 10−6   (d) 0.0045

1.48 The angle between two vectors is 0. (a) If 0 = 30.0°, which has the greater magnitude: the scalar product or the vector product of the two vectors? (b) For what value (or values) of are the magnitudes of the scalar product and the vector product equal?