Question

if sinA= 12/13 what is the value of cosA=?
​

Answer 1

Answer:

sorry sorry I didn't know

Answer 2

sin A = 12/13

P/H = 12/13

P = 12 , H = 13

${h}^{2} = {p}^{2} + {b}^{2} \\ {13}^{2} = {12}^{2} + {b}^{2} \\ 169 = 144 + {b}^{2} \\ {b}^{2} = 169 - 144 \\ {b}^{2} = 25 \\ b = \sqrt{25} \\ b = 5$

P = 12 , B = 5 , H = 13

cos A = B/H

= 5/13 Ans.