simplify: sin^3+cos^3/Sin+cos
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Answered by
5
Now,
(sin³θ + cos³θ)/(sinθ + cosθ)
= {(sinθ + cosθ) (sin²θ + cos²θ - sinθ cosθ)}/(sinθ + cosθ),
using the identity -
a³ + b³ = (a + b) (a² + b² - ab)
= sin²θ + cos²θ - sinθ cosθ
= 1 - sinθ cosθ,
since sin²θ + cos²θ = 1
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Answered by
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Sin³ + cos³/sin + cos
×××××××××××××××××××××××××
We know,
a³ + b³ = (a+b) (a²-ab+b²)
×××××××××××××××××××××××××
×××××××××××××××××××××
We know, sin²∅ + cos²∅ = 1
Then,
1 - sin cos
×××××××××××××××××××××
I hope this will help you
(-:
×××××××××××××××××××××××××
We know,
a³ + b³ = (a+b) (a²-ab+b²)
×××××××××××××××××××××××××
×××××××××××××××××××××
We know, sin²∅ + cos²∅ = 1
Then,
1 - sin cos
×××××××××××××××××××××
I hope this will help you
(-:
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