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Verify that cos squared A plus Sin squared A is equal to 1 if A is equal to 90 degrees

Sagot :

Answer:

see explanation

Step-by-step explanation:

To verify cos²A + sin²A = 1 with A = 90° , then

cos²90° + sin²90°

= (0)² + (1)²

= 0 + 1

= 1

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