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sin(35^circ)*cos(55^circ) %2B sin(55^circ)*cos(35^circ) |
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Answer» sin35 cos55 +cos35sin55/ cosec10^2-tan80^2= sin(90-35)cos55 + cos(90-35)sin55/ cosec^2(90-10) - tan80^2=cos55 cos55+sin55sin55/cosec^2(90-10)-tan80^2= cos55^2+ cos55^2/1/ sin80^2- sin80^2/ cos80^2=( coss55^2+ sin55^2)/ cos80^2- sin80^2/ sin80=1/cos80^2+ sin80^2/sin80^2= sin88^2/ cos88^2+sin80^2/+1=tan80^2+1 |
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