please solve this.....
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sardisa:
solve that
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1
may be b is the ans solution above attached.........
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Cos{(5π/2) - (19π/3)}
= -cos(15π - 38π)/6
= - cos (23π/6)
= - cos (7π/2 + π/6)
= - sin (π/6)
= - √3/2
(Ans): (B) -√3/2
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