when 0=150°
Evaluate
cos 30 - 2 cos 40
sin 30 + 2 sin 40
cos (-0)
Answers
Answered by
0
Step-by-step explanation:
cos 30 - 2 cos 40
= cos 3*150 - 2 cos 4*150
= cos 450 - 2 cos 600
= 0 - 2*(-0.5)
= -(-1)
= 1
sin 30 + 2 sin 40
= sin 450 - 2*sin 600
= 1 - (-1.732)
=2.732
cos (-0)
= cos (-150)
= cos 150
= 0.866
Answered by
0
Answer:
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Step-by-step explanation:
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