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balandron [24]
3 years ago
6

True or false? The law of cosines reduces to the pythagorean theorem for right triangles.

Mathematics
2 answers:
barxatty [35]3 years ago
8 0
Law of cosine is :
c^2<span> = a^</span>2<span> + b^</span>2<span> − 2ab cos(theeta)
</span>so in case of right triangle , angle is 90 degree:
putting 90 degrees into formula:
c^2 = a^2 + b^2<span> − 2ab cos(90)
</span>As we know that:
cos90 = 0
c^2 = a^2 + b^2<span> − 2ab (0)
</span>c^2 = a^2 + b^2<span>  - 0
</span>c^2 = a^2 + b^2 ( this is <span>pythagorean theorem ).
</span>So the above statement is True.

defon3 years ago
8 0

Answer:

It's true

Step-by-step explanation:


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