Answer:
12
Step-by-step explanation:
side 1: 4
side 2: 6
6*4*(1/2)
12
 
        
             
        
        
        
5.7t < 420  divide both sides by 5.7
5.7      5.7  
t < 73.68
 
        
                    
             
        
        
        
Answer:
8/15 
please like my answer and brainliest me HSHSSHSHS
 
        
             
        
        
        
Answer:
f(x) = + cosx or - cosx
Step-by-step explanation:
(2+tan^2x/sec^2x) -1 =(f(x))^2
=(( 1 + sec^2x)/sec^2x) -1 
= 1 / sec^2x + 1 - 1
=  1 / sec^2x
= cos^2x
(f(x))^2 = cos^2x
f(x) = + cosx or - cosx
 
        
             
        
        
        
Answer:B: 36°
Step-by-step explanation:
We know that ∆ABC is isoceles, making (angle)<ABC and <BCA congruent because base angles of isoceles triangles are congruent.
Because we have parallel lines, we can look for alternate interior angle pairs. <BCA is congruent to <DAC because they're alternate interior angles.
If <BCA is x then so is <ABC.
Since triangles add up to 180° we can add all of the angles (3x+x+x) and set it equal to 180.
3x+x+x=180
5x=180
x=36
If we were looking for <BAC we would plug that back in and solve, but we're looking for <BCA which is equal to x, therefore m<BCA=36°