Question

2sinA.cosA/cotanA + 2/sec^A =.......

^ artinya pangkat 2

Answer 1

2 sin A cos A/ cotan A + 2/ sec^2 A
2 sin A cos A sin A / cos A + 2 cos^2 A
2 sin^2 A + 2 cos^2 A
2 (sin^2 A + cos^2 A)
2
note : Cotan A = cos A / sin A
sec^A = 1/ cos^2 A
sin^2A + cos^2 A = 1