If $\varphi$ = 90° - $\theta$ , What Is the Value of Sin²

question 17

Multiple Choice

If $\varphi$ = 90° - $\theta$ , what is the value of sin² $\varphi$ + sin² $\theta$ ?

• A) "0"
• B) "1"
• C) "-1"
• D) "The answer depends on \(\theta\) ."

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