Question

Find the value of (i)
0
sin 210
(ii)
0
tan 480

Answer 1

Answer:

Sin 210=sin(90+120)=cos 120

Now, cos120=2cos^2 60-1=2×1/4-1=1/2-1. So cos120=-1/2

now for tan 480

tan 480 = tan (360+120) = tan 120.

here as the tan will fall in 2nd quadrant it will be negative. therefore tan120 = tan(180-60) = -tan 60 -√3

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Answer 2

I hope its help you..........