A plane travels at a speed of 212 mph. By rounding 212 to 1 significant figure and using your answer
to a) part (ii), work out an estimate for the number of seconds the plane
takes to travel 1 mile.

sine

step-by-step explanation:

2 x 503

step-by-step explanation:

its 1006

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92