For Exercises 47—50, use the unit circle and the period of the function to evaluate the expression. (See Example 4) 48. a. cot ( − 19 π 3 ) b. sin 510 ° c. sec ( − 13 π 2 )
For Exercises 47—50, use the unit circle and the period of the function to evaluate the expression. (See Example 4) 48. a. cot ( − 19 π 3 ) b. sin 510 ° c. sec ( − 13 π 2 )
For Exercises 47—50, use the unit circle and the period of the function to evaluate the expression. (See Example 4)
48.
a.
cot
(
−
19
π
3
)
b.
sin
510
°
c.
sec
(
−
13
π
2
)
Two-dimensional figure measured in terms of radius. It is formed by a set of points that are at a constant or fixed distance from a fixed point in the center of the plane. The parts of the circle are circumference, radius, diameter, chord, tangent, secant, arc of a circle, and segment in a circle.
For Exercises 1–2, factor the expression completely.
1. sin*x – sin?xcos?x
2. 12 tan?x + 11 tanx – 15
For Exercises 55–56, use a product-to-sum formula to find
the exact value.
55. sin 37.5°cos 7.5°
56. cos
-Cos
4
12
For Exercises 12–15, simplify completely. Write the answers
with positive exponents only.
12. a. 9°
b. -9°
c. 9xº
d. (9x)°
1
13. а.
b. т
-5
m
c. 8m-n?
d. 8m'n-2
14. (–12a-642
1
4
15.
2u°v
-3.2
Intermediate Algebra for College Students (7th Edition)
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