Find the value of cos(-30).
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Answer:
the value of cos(-30) =cos30=root3/2
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root 3÷2
Step-by-step explanation:
cos(-30)lies in the IV quadrant where only cos and sec are positive.
Hence cos(-30)=cos(30)=cos (pi÷2).
cos(-30)= cos(30)=cos(pi÷6)= root 3÷2
=0.866
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