Question

solve for a for the equation: sin(2a)+3=4.

Answer 1

sin(2a) = 4-3

What gives a value of sine of one?

Answer 2

sin(2a)=1

remember

sin(pi/2)=1

sin(pi/2+2npi)=1 for n=...-2,-1,0,1,2,3,...

so we need to solve 2a=pi/2+2npi for a

Answer 3

mutiply both sides by 1/2 an you are done!