Answer: 80
Step-by-step explanation:
Sin x = cos (90-x)
Like sin 30 = cos (90-30) =cos 60
So
90-x=90-80
Then
X=80
Verify your solution by finding the sum of the angles of sin and cos, it will be 90
Answer:
Sin Ф = Cos (90 - Ф)
Comparing with this
Sin 80 = Cos (90 - 80) = Cos 10
So, x = 80
