find the value of cos(25°)cos(20°)-sin(25°)sin (20°)
Answers
Answered by
0
Answer:
cos=5degree
Step-by-step explanation:
Formula used:
cosα cosβ+sinα sinβ=cos(α−β)
cos25
∘
cos20
∘
+sin25
∘
sin20
∘
=cos(25
∘
−20
∘
)=cos5
∘
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Answered by
3
- cos(25°)cos(20°)-sin(25°)sin (20°)
⠀
- Their value
⠀
We know that,
⠀
Therefore,
⠀
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