# calculus

posted by .

Use the even odd properties to find the exact value of the expression. It may be helpful to draw the unit circle graph sin(-pi)

• calculus -

The even-odd property for sine states that sin(-x) = -sin(x).

sin(-pi) = -sin(pi)
The point on the unit circle at pi (or 180 degrees) is (-1, 0). Sine corresponds to the y-value, so sine at that point is 0.

-sin(pi) = -0 = 0

## Similar Questions

1. ### CALCULUS

If cos(t)=–7/9, find the values of the following trigonometric functions. Note: Give exact answers, do not use decimal numbers. The answer should be a fraction or an arithmetic expression. a) cos (2t) b) sin (2t) c) cos(1/2) d) sin …
2. ### MATH

1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL STEPS) sin 2x - sin x = 0 2.) GIVEN: sin u = 3/5, 0 < u < ï/2 Find the exact values of: sin 2u, cos 2u and tan 2u using the double-angle formulas. 3.)Use …
3. ### Pre Calc

use properties of the trigonometric function to find the exact value of each expression. Do no use a calculator. sec ( - pi/18) * cos (37 pi)/18 I do not see how to do this problem. Every time I do it out I get a reference angle of …
4. ### Pre Calculus

ok I appologize for my stupidity... I'll answer your question... ok instructions to this problem In problems 77-88, use properties of the trigonmetric functions to find the exact value of each expression. Do not use a calculator 85. …
5. ### Calculus

Use the Fundamental Theorem of Calculus to find the area of the region bounded by the x-axis and the graph of y = 4 x3 − 4 x. Answer: (1) Use the Fundamental Theorem of Calculus to find the average value of f(x) = e0.9 x between …
6. ### Math - Properties of Logarithms

Use properties of logarithms to find the exact value of the expression. (log3(81)^4
7. ### pre calculus

Use properties of logarithms to find the exact value of the expression log_7 (343 * 7^15)