(4/sec²A)+(1/1+cot²A)+3sin²A=?
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Step-by-step explanation:
4/sec²A + (1/1+cot²A) + 3sin²A
= 4cos²A + (1/cosec²A) + 3sin²A
= 4cos²A + sin²A + 3sin²A
= 4 (cos²A + sin²A)
= 4
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