Use the product-to-sum or sum-to-product identities to find an identity for the given expression. sin 30° cos 38°
A. 
(cos 68° + sin 8°)
B. 
(sin 68° - sin 8°)
C. 2(sin 68° - sin 8°)
D. 
(sin 8° - sin 8°)
Answer: B
Mathematics
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B. 
C. 
D. 
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A. 
B. 
C. 
D. 
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Determine the value of the trigonometric function of ? using the given information.If csc ? = 
and sec ? = 
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Solve the equation graphically.-0.7x - 0.8 = 2Values of -0.7x - 0.8
A. -4 B. 4 C. -2.2 D. -0.8
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