Should I memorize circle trig functions?

[bretonnia]

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Sorry if that title wasn't very clear . . . I'm not sure how to make it more clear. I've been learning about circle trig functions (e.g. sin = x/r). Do we need to memorize the coordinate trig functions for each identity? (Sin, cos, tan, cot, sec, csc?) If I have to, I will; there is just a lot to memorize.

Thanks.

 

[PhansterZ]

Yes you have to remember them.
Doesn't take that long. Just practice with them and you get used to it.

SOH CAH TOA

Sin = Opp/Hyp
Cos = Adj/Hyp
Tan = Opp/Adj

csc = 1/sin
sec = 1/cos
cot = 1/tan

 

[MNdental]

Sorry if that title wasn't very clear . . . I'm not sure how to make it more clear. I've been learning about circle trig functions (e.g. sin = x/r). Do we need to memorize the coordinate trig functions for each identity? (Sin, cos, tan, cot, sec, csc?) If I have to, I will; there is just a lot to memorize.

Thanks.

for sure.

 

[Doc Smile]

Sorry if that title wasn't very clear . . . I'm not sure how to make it more clear. I've been learning about circle trig functions (e.g. sin = x/r). Do we need to memorize the coordinate trig functions for each identity? (Sin, cos, tan, cot, sec, csc?) If I have to, I will; there is just a lot to memorize.

Thanks.

If you want to do well.

 

[SN1]

Sorry if that title wasn't very clear . . . I'm not sure how to make it more clear. I've been learning about circle trig functions (e.g. sin = x/r). Do we need to memorize the coordinate trig functions for each identity? (Sin, cos, tan, cot, sec, csc?) If I have to, I will; there is just a lot to memorize.

Thanks.

Just memorize the values for the special angles (30, 60, 45) for sin, cos, and tan.
Csc, sec, cot are just reciprocal of those 3 above.

 

[PhansterZ]

Just memorize the values for the special angles (30, 60, 45) for sin, cos, and tan.
Csc, sec, cot are just reciprocal of those 3 above.

I just memorized it for sin and cos. I would have to calculate tan each time.. hehe

 

[SN1]

I just memorized it for sin and cos. I would have to calculate tan each time.. hehe

sin/cos.

that works too