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31 votes
31 votes
Would anyone be able to help with this? on my review and not sure how to do it

Would anyone be able to help with this? on my review and not sure how to do it-example-1
User Chandima
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3.1k points

1 Answer

16 votes
16 votes

90 degrees - 78 degrees = 12 degrees

cofunction of sin is cos

answer : cos12

User Slyper
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2.9k points