19.In right triangle ABC, m_B=90 and the ratio of BC to AC is 13 find the value of 1) sin' A+COSA 2)
(4tanA-SCOSA) (Ans. 1) 1, 2) -1/4)
12cosA+4 cot A)
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Answer:
cos 2 A+1 = cos^2+1/4
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Step-by-step explanation:
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