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Grade: 10

                        

Cot180/18×cot180/9×cot180/4×cot4×180/18×Cot7×180/18=???????????????????????????????????????????????????????????????????????????????

2 years ago

Answers : (1)

Aditya Gupta
2068 Points
							
Cot180/18×cot180/9×cot180/4×cot4×180/18×Cot7×180/18=Cot10×cot20×cot45×cot40×Cot70
now cot45=1 nd cot20*cot70=cot20*tan70=cot20/cot20=1
so it becomes cot10*cot40.
note that it cannot be simplified further into a closed form
2 years ago
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