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If sin of beta = 4/7, what is cos of beta?

If sin of beta = 4/7, what is cos of beta?
asked 36.2k views
5 votes
If sin of beta = 4/7, what is cos of beta?

asked
User Farshid Roohi
by
7.5k points

1 Answer

4 votes
sin²β +cos²β=1
cos²β=1-sin²β
cos²β=1-(4/7)²
cos²β=1-16/49=49/49-16/49=33/49
cosβ=√33/√49=√33/7
answered
User Niana
by
7.9k points
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