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जि की: कस वर कर अर लि कि o 2, किन(ii) cos 38° cos 52°-sin 38°5in 52° =0

Answer»

=cos(90-52)cos52-sin(90-52)sin52.because cos(90-52)=sin52.

=sin52cos52-cos52sin52=cos52(sib52-sin52)=cos52*0=0therefore final answer will be zero.



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