Trig identity questions

  • Thread starter tg22542
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  • #26
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2sinx/2cosx?
 
  • #27
CAF123
Gold Member
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2sinx/2cosx?

No. You figured that $$\tan x = \frac{\sin x}{\cos x}$$ What happens when you multiply this by 2?

You should know that $$\frac{a}{b} \times \frac{c}{d} = \frac{ac}{bd}$$
 
  • #28
MarneMath
Education Advisor
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Just to give you a concrete example. If you have 2*(4/2) that wouldn't be the same as (2*4)/(2*2), so why do you think 2(sinx/cosx) is the same as (2sinx)/(2cosx)?
 
  • #29
tiny-tim
Science Advisor
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2sinx/2cosx?

tg22542, how would you simplify 2sinx/2cosx?
 

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