A) \[\text{1 }+\text{sin}\varphi \text{ cos}\varphi \]
B) \[\text{1}-\text{sinc}\varphi \text{ cos}\varphi \]
C) \[\text{1}-\text{sin}\varphi \text{ tan}\varphi \]
D) 1
Correct Answer: A
Solution :
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