Math, asked by aryansingh08054, 1 month ago

Cos² 90° – sin² 90° find the value

Answers

Answered by IbrahimKhalil1

1

Answer:-1

Step-by-step explanation:

Cos² 90° – sin² 90°

(cos90°+sin90°)(cos90°-sin90°)=(0+1)(0-1)=-1

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