निम्नलिखित फलनों के सांतत्य पर विचार ...

निम्नलिखित फलनों के सांतत्य पर विचार कीजिए :
(a)` f(x) = sin x + cos x ` (b) ` f(x) = sin x - cos x `
(c ) ` f(x) = sinx . cos x `

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