Question

help me guys please​

Answer 1

Answer:

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