Given:
To find:
The exact value of cos 15°.
Solution:
Using half-angle identity:
Using the trigonometric identity:
Let us first solve the fraction in the numerator.
Using fraction rule:
Apply radical rule:
Using :
Answer:
h(.5)= -16(.5)^2 + 50
= 46
Answer: JW.org is where you can find your answers.
make the y int -4 because it passes through (0,-4). to make perpendicular, apply same slope to new equation but change sign