Using principal values,find the value of 2 cos ^ -1 (1/2) + 3 sin ^ -1 (-1/2).
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2 cos ^ -1 (1/2) + 3 sin ^ -1 (-1/2).
=2(π/3)+3(-π/6)
= π/6 is ur answer
=2(π/3)+3(-π/6)
= π/6 is ur answer
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