Respuesta :
sin β = cos (90-β)
sin (70⁰)= cos (90-70⁰)=cos (20⁰)
sin (70⁰)=cos (20⁰)
sin (70⁰)= cos (90-70⁰)=cos (20⁰)
sin (70⁰)=cos (20⁰)
Answer:
[tex]sin (70^{\circ})=cos (20^{\circ})[/tex]
Option C is correct.
Step-by-step explanation:
we have to choose the option for which the value is equals to sin(70°)
As in the first quadrant sine and cosine both are positive
[tex]\sin \theta = \cos (90-\theta)\\\\\sin (70^{\circ})= \cos (90-70)=\cos (20^{\circ})\\\\sin (70^{\circ})=cos (20^{\circ})[/tex]
hence, option C is correct.
