Which expression is equivalent to cos(40°)cos(10°) + sin(40°)sin(10°)? sin(40° – 10°) cos(40° + 10°) sin(40° + 10°) cos(40°

asked Apr 28, 2021 6.4k views

5 votes

Which expression is equivalent to cos(40°)cos(10°) + sin(40°)sin(10°)?

sin(40° – 10°)
cos(40° + 10°)
sin(40° + 10°)
cos(40° – 10°)

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3 votes

Answer:

its cos(40-10)

Explanation:

DeFrenZ answered May 5, 2021

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