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(Solved): 7. Use the given conditions to find the exact values of sin2u,cos2u,tan2u and the quadrant of 2u us ...



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7. Use the given conditions to find the exact values of and the quadrant of using the double-angle formulas. Quadrant of


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Given that    and    is in the second quadrant, we can use the double-angle formulas to find   ,   ,   , and the quadrant of   .


The double-angle formulas:
  
  
  


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