1.

If f(x)=∣∣∣∣sin xsin asin bcos xcos acos btan xtan atan b∣∣∣∣,where 0<a<b<π2then the equationf′(x)=0 has in the interval (a,b)

Answer»

If f(x)=
sin xsin asin bcos xcos acos btan xtan atan b
,


where 0<a<b<π2

then the equation

f(x)=0 has in the interval (a,b)





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