
Find the value of
Answer
514.5k+ views
Hint: Note that, since is greater than , it is located in the third quadrant.
Alternatively, draw the graph for y = cosx and find y when
Complete step-by-step answer:
We know is greater than and is located in the third quadrant.
Therefore,
= 0
Therefore =0
Note:
Also, from the graph of
we can see, cosine of the angles that are odd multiples of , is always zero.
Therefore = 0
Alternatively, draw the graph for y = cosx and find y when
Complete step-by-step answer:
We know
Therefore,
= 0
Therefore
Note:

Also, from the graph of
we can see, cosine of the angles that are odd multiples of
Therefore
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