Posted by **Amy** on Wednesday, February 16, 2011 at 10:51pm.

sin(-π) + cos 5π

how to solve without a calculator.

Please write steps and explain

thank you

- trig -
**Amy**, Wednesday, February 16, 2011 at 10:59pm
answer is -1

- trig -
**Anonymous**, Sunday, October 16, 2016 at 1:38am
Answer is -1

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