Question

Question #e9cf5

Answer 1

`sin(x+70^@)+sin(x+10^@)=1.2`

`=>2sin(x+40^@)cos30^@=1.2`

`=>2sin(x+40^@)sqrt3/2=1.2`

`=>sin(x+40^@)=1.2/sqrt3=0.4sqrt3=sinalpha`,
where `alpha=sin^-1(0.4sqrt3)=43.85^@`

`x=nxx189^@+(-1)^nalpha-40^@`,where `n in ZZ`