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cott (cosa) - tan-1 (cosa) = x, then sin x is equal to |
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Answer» y= cot^1-(V cosx)- tan^1-( Vcosx) let cot^1-(Vcosx)=p; sinQ=Vcosx/ V(1+ cosx); y=p-q siny= sin(p-q)=sinpcosq- cops sinq = 1/V( 1+cosx).1/V1+ cosx - Vcosx/V1+cosx. V cosx/V( 1+ cosx)=(1- cosx)/(1+ cosx) = 2 sinx^2/2/2 cosx^2/2= tanx/2^2; siny= tan^2(x/2) |
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