
Here's the solution ~
Let's find the measure of hypotenuse first, by using Pythagoras theorem ;





Now, let's find the asked values ~



For Cos y :



As we can see that both sin x and Cos y have equal values, therefore The required relationships is equality.
I.e Sin x = Cos y
Hope it helps ~
Step-by-step explanation:

Time taken is equal to distance divided by speed
So time is 50/5 = 10 seconds
Answer: a
Step-by-step explanation: