11
sec 0 - tan
sec 0 + tan
find sin 0.
4
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Step-by-step explanation:
Let,f(x)=
cot(5+3x)(cot(5)+cot(3x))−
cot3x+1
f(x)=
(
cot5+cot3x
cot5cot3x−1
)(cot5+cot3x)−
cot3x+1
=
cot5cot3x−1−
cot3x
+1
=
cot5cot3x−
cot3x
cot5cot3x=
cot3x
cot5
cot3x
=0
cot3x
=0
x=R−{
3
nπ
},nϵI