Which of the following is equal to (2sin? A +2cos? A + 3tan? A - 3 sec? A+ 4 tan A cot A)?
(0° < A < 90°)
(A) 9
(C) 1
(B) 3
(D) Depends on the value of A
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Answer:
B. 3
Explanation:
By simplifying the question using identities, we get 2-3+4= 3
(sin²A+cos²A=1; sec²A-tan²A=1)
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