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OpenStudy (anonymous):
Write the expression as the sine, cosine, or tangent of an angle cos 107° cos 42° + sin 107° sin 42° sin 65° cos 65° cos 149° sin 149°
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OpenStudy (anonymous):
Use cosA cosB + sinAsinB = cos(A-B)
OpenStudy (anonymous):
can you give me the answer please
OpenStudy (anonymous):
cos149
OpenStudy (anonymous):
thank you
OpenStudy (raden):
that is A+B, not A-B @sachinrajsharma
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OpenStudy (raden):
cos(107-42) = cos ?
OpenStudy (raden):
107-42 = ...
OpenStudy (anonymous):
B. cos 65
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