cos(40degree)cos(5degree)-sin(40degree)sin(5degree)
condense the trig expression. evaluate if possible
Answers
Answered by
2
Here's the Answer :
cos40°cos5° - sin40°sin5°
= cos ( 40°+5°)
=cos45°
= 1/√2
The formula used here is
Cos(A+B) = cosAcosB - sinAsinB
rebekahvachon:
thank you so much
wello ^_^
but don't forget to give thanx there ➡️
xD
Answered by
0
Answer:
1/root2 i.e.0.707
Step-by-step explanation:
cos40°cos5°-sin40°sin5°
=cos (40°+5°)
=cos45°
=1/root2
= 1/1.414 [ value of root 2 = 1.414]
=0.707
The formulae used here is
Cos(A+B) = cosAcosB-sinAsinB
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