Precalculus Archive: Questions from July 14, 2022
-
please help! thank you
Verify the identity. \[ \left(\csc ^{2} \theta+1\right)\left(-\cos ^{2} \theta+1\right)=2-\cos ^{2} \theta \] Which of the following four statements establishes the identity? A. \( \left(\csc ^{2} \th1 answer -
1 answer
-
Halla el valor exacto de \( \operatorname{sen}(\theta) \), dado que \( \cos (\theta)=\frac{8}{9} y \tan (\theta)1 answer -
Simplify the expression: \[ \begin{array}{l} (1+\sin \alpha)(1+\sin (-\alpha)) \\ \cos \alpha \\ \cos ^{2} \alpha \\ 1+2 \sin \alpha+\cos ^{2} \alpha \\ -\sin \alpha \end{array} \]1 answer