Find the value of cos sin-1 (-root3/2)

Dear Student,
Please find below the solution to the asked query:

Let S=cossin-1-32Now We know that sin-1-32=-π3S=cos-π3Also cos-α=cosαS=cosπ3S=12Hence cossin-1-32=12

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1/2 or -1/2
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Answer is 1/2
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