Maths-
General
Easy
Question
The minimum and maximum values of 
3x are
- -7,7
- -23,23
- -17,17
- -15,8
Hint:
In this question, we have to find the range of f(x). As we know, if f(x)=a sin x+ b cos x then, range of f(x)
, so, by using this we can find the range of f(x).
The correct answer is: -17,17
As we know, if f(x)=a sin x+ b cos x
Then, range of f(x)
As f(x)= 8 cos 3x - 15 sin 3x
So, range of f(x) 
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