Sine and Cosine of Complementary Angles

Question

Find the values for Θ that make each statement true

sin Θ= cos(25)

sin 80= cos Θ

sin Θ= cos(Θ+10)

sin (Θ- 45)= cos Θ

Thank you!

Answer 1

To get these figures; the calculator; use asin; #1 is 65°.