[" eof "cos^(-1)(cos(7 pi)/(6))" is: "],...

[" eof "cos^(-1)(cos(7 pi)/(6))" is: "],[[" (b) "(pi)/(6)," (c) "(5 pi)/(6)," (d) None "]]

[" eof "cos^(-1)(cos(7 pi)/(6))" is: "],[[" (b) "(pi)/(6)," (c) "(5 pi...
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cos^(-1)(cos((7pi)/6))is equal to (A) (7pi)/6 (B) (5pi)/6 (C) pi/3 (D)...
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The value of cos(pi/7)+cos((2pi)/7)+cos((3pi)/7)+cos((4pi)/7)+cos((5pi...
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cos ^ (6) ((pi) / (16)) + cos ^ (6) (3 (pi) / (16)) + cos ^ (6) (5 (pi...
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cos ^ (6) ((pi) / (16)) + cos ^ (6) (3 (pi) / (16)) + cos ^ (6) (5 (pi...
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The solution set of x in (-pi,pi) for the inequality sin2x+1lt=cosx+2s...
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(cos pi) / (5) + (cos (2 pi)) / (5) + (cos (6 pi)) / (5) + (cos (7 pi)...
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The value of (1+cos (pi/6))(1+cos(pi/3))(1+cos ((2pi)/3))(1+cos((7pi...
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let a=sum(r=1)^(6)cos((r pi)/(7)),b=sum(r=1)^(6)cos^(2)((r pi)/(7)),c=...
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