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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) |
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Answer» If f(x)=∣∣ where 0<a<b<π2 |
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