Thread: rules for sin/cos/tan/csc/sec/cot on unit circle?

like csc/sec have to be greater than 1

tan and cot can be any real number

sin/cos must be between 0 and 1? huh?

Originally Posted by algebra2

like csc/sec have to be greater than 1

tan and cot can be any real number

sin/cos must be between 0 and 1? huh?

csc/sec can be 1 so that should be greater than or equal to 1.

sin/cos must be between -1 and 1 (inclusive "between" so can be 1 and -1).

RonL

Originally Posted by algebra2

like csc/sec have to be greater than 1

tan and cot can be any real number

sin/cos must be between 0 and 1? huh?

Remember ASTC

1st quadrant: all of sine, cosine, and tangent are positive
2nd quadrant: only sine is > 0
3rd quadrant: only tangent is > 0
4th quadrant: only cosine is > 0