Question

Which of these is equivalent to the given angle?

A) -45 degrees

B) 135 degrees

C) 225 degrees

D) 315 degrees

Answer 1

$360 \°=2\pi \\\\\dfrac{7\pi }{4} = \dfrac{\frac{7\not\pi }{\not4} \cdot \not360 \° ^{90 \° }}{2\not\pi } =\dfrac{7\cdot \not90\° ^{45\°}}{\not2} =7\cdot45\°=315\° \\\\Answer \ D.$