Answer:
9 red shirts
Step-by-step explanation:
30 x 0.30 = 9 red shirts
The first thing to do would be to simplify the equation first. Let's apply the trigonometric functions properties where 1 + tan²x = sec² x. So, we can substitute this to the equation so that it would purely be a function of tangents.
<span>2sec</span>²<span>x-tan</span>⁴<span>x=-1
2(1+tan</span>²x) - tan⁴x = 1
2 + 2 tan²x - tan⁴x + 1 = 0
tan⁴x - 2tan²x + 1 = 0
(tanx -1)² = 0
tanx - 1 = 0
tanx = 1
x = tan⁻¹ 1
x = 45°
So, the solution for the given trigonometric equation is 45° or π/4 radians.
Answer:
853
Step-by-step explanation:
Answer:
x > 3
Step-by-step explanation:
You want an inequality
2x-1 >5
2x>6 divide by 2
x>3
3x + (5+35x) = 3x -30
38x + 5 = 3x -30
38x = 3x -35
35x = -35
x = -1
