Farhana Banu's answer to Anonymous's Secondary 4 A Maths Singapore question.

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Farhana Banu
Farhana Banu's answer
29 answers (Tutor Details)
1st
Hope this helps! You may round off the value of 'c' to 3sf if you want to.
Anonymous
Anonymous
1 year ago
hi thanks, but at sec 4 level we're not taught how to differentiate expressions like the one in the qn involving sec^2, is there an alternative way to do it?
Farhana Banu
Farhana Banu
1 year ago
cosecx can be written as (1/sinx).
u can rewrite it as (sinx)^-1
and differentiate it using chain rule
Anonymous
Anonymous
1 year ago
yepp got it thanks :)
Farhana Banu
Farhana Banu
1 year ago
ur welcome ^^