## Trigonometry (10th Edition)

1. Angle in the Quadrant I, and 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 $\csc\theta=(+)$ $\sec\theta=(+)$ $\cot\theta=(+)$