Hi, can you help me to solve this inequality?
2sin + 2cos +tan + cot + 1/sin + 1/cos=
[2.sin^2.cos + 2.cos^2.sin + sin^2 + cos^2 +sin + cos]/(sin.cos)
[sin(2sincos + 1) + cos(2sincos + 1) + 1 ]/(sincos)
[(2sincos + 1)(sin + cos) +1 ]/(sincos)
[(sin + cos)^3 +1]/(sincos)
for sin+cos , min x= 45 or 225...(by derivative)
for sin.cos , min x= 45 or 135 ...(by derivative)...and after the try, for each conditions, inaquality is true....
so, answer is x=R / (90n) ....n=0,1,2,3.....
sorry for my bad english