Evaluate cos -1 cos-4

The correct option is A π4 As for cos ^ 1 (cosθ) #160; #160;= θ∈[ 0,π #160;] #160;cos ^ 1 ( cos( π #160;/ 4 #160;) #160; #16 ...

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Vector Component

Evaluate co...

Question

Evaluate ${cos}^{- 1} (cos (\frac{π}{4}))$

\frac{π}{4}

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- \frac{π}{4}

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\frac{3 π}{4}

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- \frac{3 π}{4}

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2 sin (\frac{θ}{2}) = \sqrt{1 + sin θ} + \sqrt{1 - sin θ}

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(cot A - 1) (cot B - 1) = 2 if A + B = \frac{π}{4}

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