Problem 34 of 7
Use cos(theta)=sin(90-theta) for y degrees.
Hints
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
apply cofunction relationship.
Hidden until you reveal it.
Angles must be complementary in degrees.
Enter your answer
No answer yet
Correct
Your answer is equivalent to the expected form.
Solution
Walkthrough
Walkthrough shown
Full solution stays hidden until you ask for it.
1. Find 90 degrees minus theta.
2. Rewrite cosine as sine of the complement.
3. Check degree arithmetic.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Sine of the same angle unless theta is 45 degrees.