Question
If cos 3θ=√32, 0° < 3θ < 90°, then find the value of θ.
Answer: Option B
:
B
Given: cos3θ=√32
We know that cos30∘=√32
Comparing the two we get,
3θ=30∘.... (given0∘ < 3θ < 90∘)
⇒θ=10∘
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:
B
Given: cos3θ=√32
We know that cos30∘=√32
Comparing the two we get,
3θ=30∘.... (given0∘ < 3θ < 90∘)
⇒θ=10∘
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