A) \[15{}^\circ \]
B) \[30{}^\circ \]
C) \[45{}^\circ \]
D) \[60{}^\circ \]
Correct Answer: D
Solution :
[d] Given \[\sin x+\cos y=1\] |
Put \[x=30{}^\circ \] |
\[\sin 30{}^\circ +\cos y=1\,\,\Rightarrow \,\,\cos y=1-\frac{1}{2}\,\,(\sin 30{}^\circ =1/2)\] |
\[\Rightarrow \,\,\,\,\cos y=\frac{1}{2}\,\,\,\,\,\,\,\Rightarrow \,\,\,\,\,\,y=60{}^\circ \,\,\,\,\,(\cos 60{}^\circ \,\,=1/2)\] |
You need to login to perform this action.
You will be redirected in
3 sec