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Go Back   Freemason Hirams Travels Masonic Forums > Education & Reference > Homework Help

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Old 04-28-2008, 11:51 PM
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Help With Trig Homework?

verify the identity:

1. sin t scs t=1

3. (1+sinx)(1-sinx)= cos˛x

5. cos˛x-sin˛x=1-2sin˛x

11. (sec˛x)/(tanx) = secx cscx

14. 1/(sinx) - sinx = (cos˛x) / (sinx)
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Old 04-28-2008, 11:52 PM
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1
sint*(1/sint)=1



5
cos^2x-sin^2x
=1-sin^2x-sin^2x
1-2sin^2x

11
sec^2x/tanx=
(1/cos^2x)/(sinx/cosx)
=(1/cosx)*(1/sinx)=secx cscx

14
=(sin^2x+cos^2x)/sinx-
sin^2x/sinx
=cos^2x/sinx
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Old 04-28-2008, 11:53 PM
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1
sint*(1/sint)=1



5
cos^2x-sin^2x
=1-sin^2x-sin^2x
1-2sin^2x

11
sec^2x/tanx=
(1/cos^2x)/(sinx/cosx)
=(1/cosx)*(1/sinx)=secx cscx

14
=(sin^2x+cos^2x)/sinx-
sin^2x/sinx
=cos^2x/sinx
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Reply With Quote
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