CBSE Class 10 Answered
cos (3A-40°)=sin80°. Then value of A
Asked by sumandevi54757 | 24 Mar, 2019, 04:00: PM
Expert Answer
cos (3A -40) = sin 80
cos(3A-40) = cos(90-80) = cos 10
hence (3A-40) = 10 or A = ( 50 / 3 )
Answered by Thiyagarajan K | 24 Mar, 2019, 06:26: PM
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