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CBSE Class 10 Answered

sin18/cos72
Asked by rishinath2607 | 06 Oct, 2023, 03:06: PM
answered-by-expert Expert Answer
cos(90-θ ) = sinθ
 
begin mathsize 14px style fraction numerator sin left parenthesis 18 right parenthesis over denominator cos left parenthesis 72 right parenthesis end fraction space equals space fraction numerator sin left parenthesis 18 right parenthesis over denominator cos left parenthesis 90 minus 18 right parenthesis end fraction space equals space fraction numerator sin left parenthesis 18 right parenthesis over denominator sin left parenthesis 18 right parenthesis end fraction space equals space 1 end style
Answered by Thiyagarajan K | 06 Oct, 2023, 04:47: PM
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