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The number of solutions of the equation tanx+secx=2cosx lying in the interval [0,2pie] id

ROMIT CHAKRABORTY , 6 Years ago
Grade 11
anser 1 Answers
marthala hasita

Last Activity: 6 Years ago

tanx +secx=2cosx
1+sinx÷cosx=2cosx
1+sinx=2cos2x
1+sinx=2(1-sin2x)
2sin2x+sinx-1=0
sinx=-1,1÷2
x=270,30,180

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