3 years ago

Can someone help me thank youuu!!!

Mathematics

1 answer:

andrew-mc [135]3 years ago

4 0

Answer:

Step-by-step explanation:

cos is positive and sin is negative

it must be in quadrant IV.

you remember, 1 = sin² + cos²

1 = sin² + (3/5)² = sin² + 9/25

25/25 = sin² + 9/25

16/25 = sin²

sin = 4/5 or -4/5

and as sin of this angle is < 0, our solution is -4/5

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