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Find the value of cos (570°) |
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Answer» ong>ANSWER: =>COS(570°) =>cos(360°+210°) [ it again REPEAT the angle 210°] so, cos(210°) => cos(180°+30°) [ it is in 3rd QUADRANT and cosθ NEGATIVE in 3rd quadrant] so, -cos(30°) => -√3/2 (answer) |
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