Asked by Josh
use the sum of difference formula what is sin(pi/2-5pi/3)?
Answers
Answered by
Damon
sin(a-b) = sin a cos b - cos a sin b
sin(pi/2-5pi/3) = 1 cos(5 pi/3) - 0
= cos (5 pi/3)
= cos (2pi - (pi/3))
= cos (-pi/3)
= cos 60 deg
= 1/2
sin(pi/2-5pi/3) = 1 cos(5 pi/3) - 0
= cos (5 pi/3)
= cos (2pi - (pi/3))
= cos (-pi/3)
= cos 60 deg
= 1/2
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