Option C:
x = 90°
Solution:
Given equation:
<u>To find the degree:</u>
Subtract 1 + cos²x from both sides.
Using the trigonometric identity:
Let sin x = u
Factor the quadratic equation.
u + 2 = 0, u – 1 = 0
u = –2, u = 1
That is sin x = –2, sin x = 1
sin x can't be smaller than –1 for real solutions. So ignore sin x = –2.
sin x = 1
The value of sin is 1 for 90°.
x = 90°.
Option C is the correct answer.
Answer:
144
Step-by-step explanation:
Sorry, the text you have requested has been deleted. Make sure that you have the correct URL and the owner of the text hasn't deleted it.
Thank you for posting your question here at brainly. The two postulate planes is the below:
1: A line contains at least two points. Postulate 1a: A plane contains at least three points not all onone line. Postulate 1b: Space contains at least four points not all on one plane. Postulate
5: If two planes intersect, then their intersection is a line.
Answer:
Step-by-step explanation:
find the slope 1/2
then write it as y-4=1/2(x+6)
then u get y=1/2x+7
