third trig question from one billion

If cos (x)°  = 0.788

Then

arccos(0.788)   = x =  38°

So

cos( x + 0.5)°   =

cos(38 + 0.5)°  = about 0.7826 = about  0.783    (E)

E is the answer

cos (x +0.5)  NOT EQUAL to cos x + cos 0.5

why did you inverse it :)

Remember, Solveit.....it we're given the value of some trig function, we have to take the inverse to find what angle that function is referring to.

In this case, we know that the cosx = 0.788

So....to find out what x is, we need to take the cosine inverse to find the angle where the cosine is equal to 0.788.

Thanks CPhill and Guest !

;))))))))))))))))))))))

buna

buna

да нет не buna