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# Core 3 Help:D watch

1. Hi guys:

4 cos(θ + 60◦) cos(θ + 30◦) ≡ √3 − 2 sin 2θ.
(iv) Given that there are no values of θ which satisfy the equation 4 cos(θ + 60◦) cos(θ + 30◦) = k
determine the set of values of the constant k.

2. (Original post by EmLo12)
Hi guys:

4 cos(θ + 60◦) cos(θ + 30◦) ≡ √3 − 2 sin 2θ.
(iv) Given that there are no values of θ which satisfy the equation 4 cos(θ + 60◦) cos(θ + 30◦) = k
determine the set of values of the constant k.

Have you applied what the early part of the question (I.e. The identity in your post) to it? This may help you see it
3. (Original post by Kevin De Bruyne)
Have you applied what the early part of the question (I.e. The identity in your post) to it? This may help you see it
Hello, yes I have. I did the whole question but got stuck on the last part It's all good now though thank you

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Updated: October 13, 2017
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