express the following as functions of positive acute angle: 1 sin(-840) , 2 cos(1220) , 3 cot(-640) , 4 - Maths - Trigonometric Functions

Question

express the following as functions of positive acute angle: 1
sin(-840) , 2 cos(1220) , 3 cot(-640) , 4 tan(300) , 5 cosec 420 ,
6 sin(420) , 7 sin(-1110) , 8 cos(-1050)

Ashwini Kumar · Accepted Answer

1 sin-840°=sin3×360°-840°=sin240°=sin180°+60°=-sin60°2 cos1220°= cos3×360°+140°=cos140°=cos180°-40°=-cos40°Note: For more questions please post the question again

express the following as functions of positive acute angle: 1.sin(-840) , 2.cos(1220) , 3. cot(-640) , 4.tan(300) , 5.cosec 420 , 6.sin(420) , 7. sin(-1110) , 8. cos(-1050)