SOLUTION: Hello, I need help concerning these problems. I don't know which ones to circle. I would appreciate any help you can give me. Thanks in advance! 1. Circle all expressions that

Question 1092648: Hello, I need help concerning these problems. I don't know which ones to circle. I would appreciate any help you can give me. Thanks in advance!
1. Circle all expressions that are equivalent to sin4a.
A. 4 sin a cos a
B. 4 sin a cos a - 8 sin^3 a cos a
C. sin a cos 3a - cos a sin 3a
D. 2 sin 2a cos 2a
E. 4 sin a cos a cos 2a
F. 4 sin a cos^3 a - 4 sin^3 a cos a
2. Circle the expression that is equivalent to tan 3pi/8.
A. Square root of 2 +1
B. Square root of 2 -1
C. 1 - square root of 2
D. None of these.
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
https://www.algebra.com/algebra/homework/Pythagorean-theorem/Pythagorean-theorem.faq.question.39250.html
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