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( i s - a ) - \frac { 4 } { 3 } , b ) \frac { 4 } { 3 } , c ) \frac { 4 } { 5 } , d ) - \frac { 4 } { 5 } |
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Answer» tant=3so cost=1/root(9+1)=1/root(10)cos2t=2cos^2t-1=2(1/root(10))^2-1 =2(1/10)-1=1/5-1=-4/5 |
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