Problem 94 of 7
Use complementary relationship to compare trig values sin(50) and cos(20).
Hints
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
reason about equivalent ratios.
Hidden until you reveal it.
Use sine-cosine equivalence only for complementary angles.
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. Identify one sine angle and one cosine angle.
2. Add the angle measures.
3. Conclude equality if the sum is 90 degrees.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Assuming all sine and cosine pairs are equal.