sin 45 sin 30+ cos 40
cos 30 find
Answers
Answered by
2
Step-by-step explanation:
Given that
Sin 45°Sin30°+Cos45°Cos 30°
=>(1/√2)(1/2)+(1/√2)(√3/2)
=>(1/2√2)+(√3/2√2)
=>(1+√3)/2√2
Sin 45°Sin30°+Cos45°Cos 30°
Cos45°Cos 30°+Sin 45°Sin30°
Here, A=45° ,B=30°
This is in the form of
Cos A Cos B+Sin A Sin B
We know that
Cos A Cos B+Sin A Sin B=Cos(A-B)
Cos45°Cos 30°+Sin 45°Sin30°=Cos(45°-30°)=Cos15°
Cos 15°=(1+√3)/2√2
Answered by
0
Answer:
1+√3)/2√2 is the answer for your question
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