Question

when 0=150°
Evaluate
cos 30 - 2 cos 40
sin 30 + 2 sin 40
cos (-0)​

Answer 1

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

Answer 2

Answer:

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Step-by-step explanation:

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