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kogti [31]
3 years ago
15

What are the three Pythagorean identities?

Mathematics
1 answer:
suter [353]3 years ago
4 0
Pythagorean \ Identity : \\\\1) \\\\sin^2\alpha  +cos^2\alpha =1\\\\2)\\\\tan^2\alpha +1=sec^2\alpha \\\\ 3)\\\\1+cot^2\alpha =csc^2\alpha
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Can someone help me with is and please explain thanks
Andrew [12]
The answer is b because the pattern  of these terms r that odd numbers r positive and even numbers are negative. 50 is even so it is negative, while 51 is odd so it is positive. Remember that negative numbers are below zero. If u add something to a negative number it is like subtracting positive numbers. -51+50 is -1. Because if 51 was positive it would be 51 minus 50. The answer is b. If u dont understand or if it is wrong tell me. :D
6 0
3 years ago
In ΔDEF, the measure of ∠F=90°, FD = 63 feet, and DE = 71 feet. Find the measure of ∠E to the nearest degree.
stepan [7]

Answer:

Step-by-step explanation:

∠F=90°, FD = 63 feet, and DE = 71 feet.

That's a right angle triangle also.

measure of ∠E to the nearest degree

sin∠E = 63/71

sin∠E = 0.8873

∠E= sin^-1 0.8873

∠E= 62.5°

7 0
3 years ago
2x^3+17x^2+23x-42; 2x+7
Klio2033 [76]

Answer:

(x−1)(x+6)(2x+7); 2x+7

Step-by-step explanation:

2x3+17x2+23x−42

=(x−1)(x+6)(2x+7)

i could just simplify the first part

6 0
2 years ago
What is 13x + 21y - 14x - y simplified?
Arisa [49]

Answer:

-x + 20y

Step-by-step explanation:

trust me.. its right

4 0
2 years ago
1 2/3 yards of chain cost 9.00 how much does it cost per chain
Lady_Fox [76]
Lets make it an improper fraction
5/3 
we do not know how many chains so we'll put the (x) 

therefore 
5/3x=9.00
x= 5.4
7 0
3 years ago
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