positive angles x and y such that x+2y=300º and tan y= 2 cos160º. Find their values.

Additional mathematics book. Chapter 10. Ex 10.2, question no#14.
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1 Answer

x+2y=300 degrees

tan(y)=2*kosine(160)

kosine(160)=-0.93969262

2*kosine=-1.879385242

y=invers tangent(-1.87....)=-61.98305335 deg

round it tu -62 deg

but yukan add 180 deg...tan=sine/kosine & both av em chaenj sine at +180deg (sines kansel)

angel=180-62=118

x+2y=300, so x=300-2y=300-236

x=64
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