If sin(x+20^0)=2sinxcos40^0,where in (0,...

If `sin(x+20^0)=2sinxcos40^0,where in (0,pi/2),` then which of the following hold(s) good? (a)`cos2x=1/2` (b) `cos e c4x=2` (c)`secx/2=sqrt(6)-sqrt(2)` (d) `tanx/2=(2-sqrt(3))`

If sin(x+20^0)=2sinxcos40^0,where in (0,pi/2), then which of the foll...
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Number of roots of cos^2x+(sqrt(3)+1)/2sinx-(sqrt(3))/4-1=0 which lie ...
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If sin(x+20^0)=2sinxcos40^0,where in (0,pi/2), then which of the foll...
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Which of the following has the maximum value unity: (a)sin ^(2)x-cos^(...
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If int(0)^(oo)e^(-x^(2))dx=(sqrt(pi))/(2), then int(0)^(oo)e^(-ax^(2))...
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sin^(-1)sqrt((2-sqrt(3))/4)+cos^(-1)(sqrt(12)/4)+sec^(-1)(sqrt(2))= (...
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If 0<A<B<pi,sin A+sin B=sqrt((3)/(2)) and cos A+cos B=(1)/(sqrt(2)) th...
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If 0<A<B<pi,sin A+sin B=sqrt((3)/(2)) and cos A+cos B=(1)/(sqrt(2)) th...
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A solution of sin^-1 (1) -sin^-1 (sqrt(3)/x^2)- pi/6 =0 is (A) x=-sqrt...
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