What is the exact value of cosine of open paren c plus d close paren , given sine c is equal to 24 over 25 for c in Quadrant II and cosine d is equal to negative 3 fourths for d in Quadrant III?
Answer
A
the fraction with numerator 21 minus 24 square root of 7 and denominator 100
B
the fraction with numerator 21 plus 24 square root of 7 and denominator 100