If sec (x) = -4/3 and sin (x) > 0, find the exact value of tan (x)...
Hi tradar -
First you need to use:
This will give you a value for . When you take the square root, be careful with the sign. Which do you choose?
Well, we're told that and . Now . So . And, of course, , so also.
So take the negative square root, and there's your answer.
Grandad