The last one is rightHope this helps!
Cos x = sin (90 - x)
cos 63 = sin (90 - 63)
cos 63 = sin 27
x = 27
For this case we must find the quotient of the following expression:

We can rewrite the expression as:
(We take into account that
)

By definition of multiplication of powers of the same base, we place the same base and add the exponents:

By definition of division of powers of the same base, we place the same base and subtract the exponents:

Answer:

Answer:
m<R = 22.62°
Step-by-step explanation:
Reference angle = R
Opposite = 5 cm
Hypotenuse = 13 cm
Apply the trigonometric function SOH:
Sin R = Opp/Hyp


R = 22.6198649°
m<R = 22.62° (nearest hundredth)