Can someone show me the solution in this one? 3 tan 240º - sin² 135º + 2 cot 210º
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Hi jasonlewiz. Originally Posted by jasonlewiz Can someone show me the solution in this one? 3 tan 240º - sin² 135º + 2 cot 210º What's the problem? Don't you have a calculator on your own? btw, it is tan = sin/cos and cotan = 1/tan = cos/sin Therefore you got to solve 3 sin(240º)/cos(240°) - sin(135º)*sin(135°) + 2 cos( 210º)/sin(210°) Yours Rapha
tan (240º) = tan(180º + 60º) sin (135º) = sin (180º - 45º) cot (210º) = cot (180º + 30º) = 1 / tan (180º + 30º)
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