Join the IDNLearn.com community and start finding the answers you need today. Discover comprehensive answers from knowledgeable members of our community, covering a wide range of topics to meet all your informational needs.

Select the correct answer from each drop-down menu. cos ⁡ ( 7 ⁢ π 12 ) + cos ⁡ ( π 12 ) = cos ⁡ ( 7 ⁢ π 12 ) − cos ⁡ ( π 12 ) =

Sagot :