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ICSE Class 9 Answered

Sin(90-31)×sec31
Asked by parameshmgowdasuki | 10 Sep, 2020, 06:08: PM
answered-by-expert Expert Answer
S i n open parentheses 90 minus theta close parentheses equals C o s theta S i n open parentheses 90 minus 31 close parentheses equals C o s 31 T h e r e f o r e S i n open parentheses 90 minus 31 close parentheses cross times S e c 31 equals C o s 31 cross times S e c 31 equals C o s 31 cross times fraction numerator 1 over denominator C o s 31 end fraction equals 1
Answered by Utkarsh Lokhande | 11 Sep, 2020, 10:31: AM

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