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3A"If Sin3A- cos CA-26)Les do acute angle.Value of Awheretnthe |
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Answer» sin3A=cos(A-26°)or , cos(90°-3A)=cos(A-26°)or , 90°-3A=A-26°or , A+3A=90°+26°or , 4A=116°or , A=116°/4or , A=29° sin3A= cos(A-20); cos(90-3A)= cos( A-26) 90-3A=A-26; 90+26=4A 116=4A; A=116/4=29 A=29°is is the correct answer for this question a=29 is the right answer for this question |
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