When is cos (x) = 0? <em>at 90° (aka π/2)</em>
Answer:
What is 7.0055 as a mixed number
2 answers:
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Answer:
Using trigonometric ratio:
From the given statement:
and sin < 0
⇒ lies in the 3rd quadrant.
then;
Using trigonometry identities:
Substitute the given values we have;
Since, sin < 0
⇒
now, find :
Substitute the given values we have;
Therefore, the exact value of:
(a)
(b)