Question

If sin ∅ = cos ∅, then ∅ = ?
please give step by step explanation ​

Answer 1

Answer:

if sin phi=cos phi

phi=(cos ^(-1))(sin phi)

phi=cos ^-1(sin pi/2- phi)

phi=cos^-1(cos phi)

or

sin phi=cos phi

sin phi= sin (pi/2-phi)

2phi=pi/2

phi=pi/4

which means phi=45°

hope it helps