# Thread: What is sin, cos, tan, arcsin, arc...etc between?

1. ## What is sin, cos, tan, arcsin, arc...etc between?

Is there a legend online where I can lookup where each of those trig functions are between? like how sin is between -pi/2 and pi/2 but for all of them?

2. Originally Posted by circuscircus
Is there a legend online where I can lookup where each of those trig functions are between? like how sin is between -pi/2 and pi/2 but for all of them?
Please try and explain your question more clearly, as it is this is completely
incomprehensible to me.

There is a mnemonic to remember which is positive in which quadrant.

All Silly Tom Cats, meaning sin, cos and tan are positive in the first quadrant,
sin only in the second, tan only in the third and cos only in the fourth.

RonL

3. Originally Posted by CaptainBlack
Please try and explain your question more clearly, as it is this is completely
incomprehensible to me.

There is a mnemonic to remember which is positive in which quadrant.

All Silly Tom Cats, meaning sin, cos and tan are positive in the first quadrant,
sin only in the second, tan only in the third and cos only in the fourth.

RonL
The mnemonic I learnt was "All Students Take Calculus," but students at my school say "All Students Take Crack."