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# Solving Trig Equations watch

1. How would you solve this trig equation?

sin(a) + cos(a) = 1

Thank you )
2. (Original post by emx_eco)
How would you solve this trig equation?

sin(a) + cos(a) = 1

Thank you )
The easiest way is to use a method called harmonic form (also known as the R - alpha method). Does this sound familiar to you?
3. (Original post by Pangol)
The easiest way is to use a method called harmonic form (also known as the R - alpha method). Does this sound familiar to you?
yeah it does, i'll try it now and get back to you- thanks
4. (Original post by Pangol)
The easiest way is to use a method called harmonic form (also known as the R - alpha method). Does this sound familiar to you?
Any idea why it's called the harmonic addition theorem?
5. (Original post by Desmos)
Any idea why it's called the harmonic addition theorem?
You know, I really don't know why this is called harmonic form, but I can see that one useful application would be simple harmonic motion, so perhaps that's it.
6. (Original post by Desmos)
Any idea why it's called the harmonic addition theorem?
no idea
7. (Original post by Pangol)
The easiest way is to use a method called harmonic form (also known as the R - alpha method). Does this sound familiar to you?
I think I get it now, thanks for your help

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