Question 941283
assume that the angular measures are in radians:
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assume that 3.14 in the given equation stands for pi:
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cos( (3.14/2) + x ) = -1
acos( cos( (3.14/2) + x ) ) = acos( -1 )
(3.14/2) + x = acos( -1 )
x = acos( -1 ) - (3.14/2)
x = pi - pi/2
x = 2pi/2 - pi/2
x = pi/2
x = 3.14/2
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answer:
B. (3.14/2)
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