Answer:
x=7
Step-by-step explanation:
AB=BC[ because two sides of isosceles triangles are equal ]
or, 2x+9=5x-12
or,9+12=5x-2x
or,21=3x
or,x= 21/3
therefore, x=3
The trigonometric expression tan² x + 1 = sec² x is proved by using the fundamental trigonometric formula and the definition of tangent and secant.
<h3>How to prove a derivate trigonometric formula</h3>
In this problem we must prove the existence of a trigonometric formula by means of definitions of trigonometric functions and the fundamental trigonometric formula.
Step 1 - Introduce the fundamental trigonometric formula and the definitions of tangent and secant:
sin² x + cos² x = 1, tan x = sin x / cos x, sec x = 1 / cos x
Step 2 - Divide each side of the formula by cos² x:
sin² x / cos² x + cos² x / cos² x = 1 / cos² x
(sin x / cos x)² + 1 = (1 / cos x)²
Step 3 - Use the definition of the two trigonometric functions:
tan² x + 1 = sec² x
To learn more on trigonometric functions: brainly.com/question/14746686
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Answer:
12x26
Step-by-step explanation:
Area of a room A = 18*32 = 576 sq ft
She can leave 6 ft around the rug, so
312 sq ft = 12 * 26
1.50+3+2.50×p=12
Do 1.50+3+2.50
then multiply it by p which I whatever amount of people you want and it equals an answer
Answer:
Yamato's here!
Step-by-step explanation:
Oh well thank you! Have a nice and great holiday!!
(^ - ^ /)Xoxo, Yamato-
