Please help me with this

Question

Find one solution of the equation utilizing inverse trig function.

-4=7cos(t)

Answer 1

-4=7cos(t)

cos(t)=-4/7. Take the inverse cos of both sides and you get t=124.8degrees+n(360)

the other answer is 235.2+n(360)

Answer 2

cos(t) = -4/7

t = cos^-1(-4/7) = 124.85°

Since the cosine is negative, the angle is in either Q II or Q III. The other solution is:

t = 249.7