Question 1010922
Any cosine or sine will vary between +1 and -1
These 2 functions multiply the sine and cosine by {{{ 3 }}},
so they will vary between +3 and -3
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If I say {{{ 2x = theta }}}, then I have:
{{{ y = 3*sin( theta ) }}} and
{{{ y = 3*cos( theta ) }}}
{{{ theta }}} varies between {{{ 0 }}} and {{{ 2*pi }}},
so {{{ 2x = 2*pi }}}
{{{ x = pi }}}
{{{ x }}} will vary between {{{0}}} and {{{ pi }}}
for each cycle
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Also, the cosine is symmetrical about the y-axis
and the sine is not symmetrical