CosA=1/under root2, SinA= -1/under root 2.?
find the value of A. thanks
- JOHNLv 77 years agoFavourite answer
A is in the 4th quadrant from the info given. So A=7π/4. Verify: sin(7π/4)=sin (2π-π/4)=sin2πcosπ/4-cos2πsinπ/4=
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