Mathematics, 08.01.2020 23:31, mashcroft2002
1/sec (x) - 1 + 1/sec (x)+1=2cos(x)cosec²(x). solve that or prove it
Answers: 1
and multiply the second fraction by 
.
which 
, we only have to multiply first terms and then last terms giving us 
.
with 
:
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1/sec (x) - 1 + 1/sec (x)+1=2cos(x)cosec²(x). solve that or prove it...
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