If cosθ=sinβ, then the two angles must be ??

See last answer.

 

 

hint for both.

 

draw a right anglesd triangle.

Label the right angle, and call the other angles theta and beta.

Label the hypotenuse h

call the other 2 sides p and q   doesn't matter which is which.

 

Now what is      cos(theta)   

and what is       sin(beta)

 

What is    theta+alpha ?

 

What do those word in the answers mean?  You can look them up online by yourself if you need to.

 

 

Please no one answer over me.