Trig (1 Viewer)

[yeyjasminetime]

Hi! How would you find the value of this?

 

[Trebla]

Recall that



Replace x with ax then



But ax approaching zero is equivalent to x approach zero so



Now manipulate your expression to look like this (i.e. multiplying and dividing constants to numerator and denominator) and apply the result.

 

[phoenix159]

The answer is 6/5

 

[Trebla]

The answer is 15/2

 

[QZP]

@Trebla, for

When do I learn this? I've done trigonometry but havn't come across it

 

[Trebla]

@Trebla, for

When do I learn this? I've done trigonometry but havn't come across it

This is in the Further Trigonometry topic which is usually covered in Year 12.

 

[phoenix159]

@Trebla, for

When do I learn this? I've done trigonometry but havn't come across it

You usually do it as part of differential calculus when you differentiate trig functions

 

[hit patel]

Yes it is called trig functions and comes within differential and integral of trig functions topic but before that.