Trig multiplication helpWatch

#1
9cosx and needed to multiply it with 2sinxcosx,
would it be wrong to say that equals:

18sinxcos^2x
(18sinx cos squared x)

thank you
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10 years ago
#2
It would not be wrong.
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10 years ago
#3
(Original post by notnek)
It would not be wrong.
By which you mean it would be right.
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#4
So generally in all terms, the number before the trig function can still be used for another when multiplying?

eg. 6cosx x 5tanxsinx
would give
30cosxtanxsinx per se?
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#5
And thank you
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10 years ago
#6
(Original post by RedCherry786)
So generally in all terms, the number before the trig function can still be used for another when multiplying?

eg. 6cosx x 5tanxsinx
would give
30cosxtanxsinx per se?
That's correct but do make sure to simplify things as much as possible.
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10 years ago
#7
Yes, but of course, tan x cos =sin...so it would be 30sin^2x :P
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10 years ago
#8
Think of basic algebra rules:

abc x def = abcdef in any order.

So 6cosx x 5tanxsinx is like ab x cde = acbde

6cosx x 5tanxsinx = 30.cosx.tanx.sinx
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