Mathematics, 20.07.2019 02:00 SmokeyRN
Prove or disprove that 2cosx is the same as cotx(cosxtanx+sinx)
Answers: 1
![cot(x)[cos(x)tan(x)+sin(x)]=](/tpl/images/0110/0238/58775.png)
![\frac{cos(x)}{sin(x)}[cos(x) \frac{sin(x)}{cos(x)} +sin(x)]=](/tpl/images/0110/0238/349fa.png)
![\frac{cos(x)}{sin(x)}[sin(x) +sin(x)]= \frac{cos(x)}{sin(x)}[2sin(x)]=2cos(x)](/tpl/images/0110/0238/021d3.png)
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Prove or disprove that 2cosx is the same as cotx(cosxtanx+sinx)...
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