Math, asked by ant880423, 1 year ago

if 2sinA=2-cosA. then find sinA

Answers

Answered by Shubhendu8898
2
Given ,2 sinA = 2 - cosAmaking squre of  both sides:2 sin²A = (2 - cosA)²4 sin²A= 4 + (cos²A - 4cosA4 - 4 cos²A = 4 + cos²A - 4 cosA4 - 4 cos²A - 4 - cos²A + 4 cosA = 04 cosA - 5 co²sA = 0cosA(4 - 5cosA) =0if cosA= 0cosA= cosπ/2A= π/2or,if 4 - 5cosA= 0
cosA = 4/5
A = cos⁻1(4/5)
Similar questions