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after equating 3x=pi/2-x, -> x=(pi/8) what is the next to finding the other solutions if there is more than one solution
 

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chilli 412

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this doesnt really help but there should be 6 solutions in total between 0 and 2pi
 

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Ohh okay for general formula why are you using npi not 2npi?
 

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Ohh okay for general formula why are you using npi not 2npi?
The general angle formulae for sin x = sin a, cos x = cos a and tan x = tan a are:

 
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hogzillaAnson

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Using the general solution formula is very efficient, but it's not in the current syllabus, which means it's not on the reference sheet, and I fear that under the pressure of an exam one could misremember them resulting in errors.

One alternate solution can be found using product to sums (which you can copy directly from the reference sheet):

 

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