the value of cos 48 degree minus sin 42 degree
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Answer:
1
=
2
2
+1
Explanation:
Recall the unit circle:
From the unit circle we can see that at 45
∘
the position of the angle on the unit circle is at (
2
2
,
2
2
)
(
2
2
,
2
2
)=(cosθ,sinθ)
So, for 45
∘
,sin(45
∘
)=
2
2
Now, from the unit circle we can see that at 60
∘
the position of the angle on the unit circle is at (
2
1
,
2
3
)
(
2
1
,
2
3
)=(cosθ,sinθ)
So, for 60
∘
.cos(60
∘
)=
2
1
So,
sin(45
∘
)+cos(60
∘
)=
2
2
+
2
1
solution
Explanation:
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