Tanija1995
27.12.2020 •
Mathematics
If sinA÷2 =4÷2 find the value of cosA (not by pythagoras theorem)
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Ответ:
Step-by-step explanation:
Sin A ÷ 2 = 2
Sin A = 2×2
Sin A = 4
Cos A = sqrt (1 - Sin ^2 A) = sqrt(1 - 4^2)
Cos A = sqrt(1-16) = sqrt (-15) = sqrt(15i^2)
Cos A = i sqrt(15)
Ответ:
answer:
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