help me guys please
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Sin(360-theta) lies in 4th quadrant so it is negative
so it is -sintheta
Cos(120)=Cos(180-60)=-cos60=-1/2 since costheta lies in 2nd quadrant and is negative there
3. option c is the correct one
4. sintheta is negative in 3rd and 4th quadrants so theta belongs to fourth quadrant
5. putting alpha= 90 the equation is satisfied that is sin alpha =cosec alpha =1 so 1^n+1^n=2
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