Find the exact value of the expression.
A. 
B. 2 + 
C. 
D. -2 + 
Answer: D
Mathematics
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Use a calculator to find a decimal approximation for the indicated function value. Round your answer to four decimal places.cos (-497°)
A. -0.9744 B. -0.7314 C. -0.2924 D. -0.6820
Mathematics
Identify the equation as either an identity or not.
= 
A. Not an identity B. Identity
Mathematics
Factor completely. If the polynomial is prime, state this.4x3 + 12x2y - 40xy2
A. 4x(x - 2y)(x + 5y) B. (x - 2y)(4x2 + 20xy) C. 4x(x + 2y)(x - 5y) D. (4x2 + 8xy)(x - 5y)
Mathematics
Find the exact value of the expression. Do not use a calculator.cos 35°sin 55° + sin 35°cos 55°
A. 0 B. 2 C. -1 D. 1
Mathematics