What is the value ? options are provided
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Answer:
The exact value of cos(15°) is √(2 + √( 3)) / 2.
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0
Answer:
cos2θ=2cos2θ−1
Step-by-step explanation:
From the trigonometric identities we know that cos2θ=2cos2θ−1, in this double angle formula if we put θ = 15° then we get cos15° in terms of cos30° hence we can find the value of cos15°.
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