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D. 12/1312. Use the unit circle to find cos ( 7 )a.S S/-b.o. 1/2d. -1/2
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D. 12/1312. Use the unit circle to find cos ( 7 )a.S S/-b.o. 1/2d. -1/2

D. 12/1312. Use the unit circle to find cos ( 7 )a.S S/-b.o. 1/2d. -1/2-example-1
User Cuong Tran
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1 Answer

4 votes

Step 1

Write the trigonometric expression


cos((7\pi)/(6))

Step 2:

Step 3


cos((7\pi)/(6))\text{ = -cos\lparen}(\pi)/(6)\text{\rparen= -cos30}\degree\text{ = -}(√(3))/(2)

Final answer


-(√(3))/(2)

D. 12/1312. Use the unit circle to find cos ( 7 )a.S S/-b.o. 1/2d. -1/2-example-1
User The Coprolal
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