Trig help ...............

asked May 15, 2018 47.0k views

3 votes

by Nax

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Answer: D

Explanation:

Acharuva answered May 18, 2018

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3 votes

letter D

A = 135°
B = 30°

cosAcosB - sinAsinB = cos(A+B)

cos(135°+30°)
cos(165°)

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