Question

5.
Find the value of the following angles:
(i) sin (150°) (ii) cos (210)
(iii) sin(-45) (iv) tan (-30)​

Answer 1

I) sin(150)=sin(180-30)

since sin is positive is second quadrant

sin(180-30)=sin(30)

=1/2

ii)cos(210)=cos(180+30)

since cos is negative in third quadrant

cos(180+30)=-cos(30)

=-under root 3/2

iii) sin(-45)= -1/under root 2

iv)tan(-30)= -1/under root 3

Answer 2

Answer:

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