It will be b im ask my teacher
        
             
        
        
        
Step-by-step explanation:
Tip 1) Always Start from the More Complex Side.
Tip 2) Express everything into Sine and Cosine.
Tip 3) Combine Terms into a Single Fraction.
Tip 4) Use Pythagorean Identities to transform between sin²x and cos²x.
Tip 5) Know when to Apply Double Angle Formula (DAF)
I am also from nepal...very happy to see you..
 
        
             
        
        
        
Answer:
the answer is 8
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
y= -3/4x - 3
Step-by-step explanation:
-3/4 is the slope, so you replace m with the slope.
The y intercept is -3. If x is 4, and y is -6, we can plug that into an equation to find the y intercept. y=mx+b can change to -6= -3/4 * 4 + b. B = -3.
 
        
             
        
        
        
You said                      x + 2/5 = 12
It might be easier to handle if we use the decimal for 2/5.
                                               x + 0.4 = 12
Subtract 0.4 from each side:  x = 11.6
That's all there is to it.  I'm sorry I can't make it 
more complicated for you.