Answer
sin, cos, tan, sec,csc, cot are positive
Work Step by Step
1. Angle in the Quadrant I, coterminal angle between 0 and 90. It will have positive x and y values. r is always positive.
2. Determine the sign:
$\sin\theta=\frac{y}{r}= (+)$
$\cos\theta=\frac{x}{r}= (+)$
$\tan\theta=\frac{y}{x}= (+)$
3. Remember, the reciprocal trig function will have the same sign as the original function
$\csc\theta=(+)$
$\sec\theta=(+)$
$\cot\theta=(+)$
