Sin x

PV + 2πn
SV + 2πn

Mae sin yn ailadrodd bob 360^o felly bob 2π radian.
Sine repeats every 360^o so every 2π radians.

Cos x

± PV + 2πn

Mae cos hefyd yn ailadrodd bob 360^o felly bob 2π radian.
Cosine also repeats every 360^o so every 2π radians.

Tan x

PV + πn

Mae tan yn ailadrodd bob 180^o felly bob π radian.
Tan repeats every 180^o so every π radians.

Onglau Cyfansawdd
Compound Angles

sin (2x) = 1/2

2x = π/6 + 2πn, 2x = 5π/6 + 2πn

x = π/12 + πn, x = 5π/12 + πn

Darganfod y datrysiad cyffredinol ar gyfer 2x.
Find the general solution for 2x.

YNA rhannu trwodd hefo 2.
THEN divide by 2.