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Trignometry
lies inthe intervalComments (6)
sin @ + sin 2@ / 1 + cos @ + cos 2@
= sin @ (1 + 2cos@) / 1 + cos@ + 2cos2@ - 1
= sin @ (1 + 2cos@) / cos @ (1 + 2cos@)
= tan @
except for 1 + 2cos@ = 0 as this is not in domain
cos @ = -1/2
but for (-pi/2, pi/2) cos is never -ve.........
so automatically excluded!!
thrfr the range is R (all reals) i.e. (-infinity, + infinity)
sin @ + sin 2@ / 1 + cos @ + cos 2@
= sin @ (1 + 2cos@) / 1 + cos@ + 2cos2@ - 1
= sin @ (1 + 2cos@) / cos @ (1 + 2cos@)
= tan @
except for 1 + 2cos@ = 0 as this is not in domain
cos @ = -1/2
but for (-pi/2, pi/2) cos is never -ve.........
so automatically excluded!!
thrfr the range is R (all reals) i.e. (-infinity, + infinity)
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???? plz explain the Question.