\( \cos ^ { 2 } ( 45 ^ { \circ } - A ) - \sin ^ { 2 } ( 45 ^ { \circ } - A ) \)

tan \( 0.8035=\underline{\text { Blank } 1} \) (Express your answer in 3 decimal points) Blank 1 Add your Thnswer

\( \left(\sec 79.36^{\circ}\right)\left(\sin 79.36^{\circ}\right)-\left(\tan 79.36^{\circ}\right)=\underline{\text { Blank } 1} \)

[3] If \( \sin \theta=\frac{3}{5} \) where \( 90<\theta<180 \), then \( \sin (180-\theta)+\cos (\theta-90)=\ldots \ldots \ldots \) (a) \( \frac{4}{5} \) (b) 1 (c) \( \frac{6}{5} \) (d) \( \frac{-6}{5} \)

\( \csc 82.4^{\circ}= \) Blank 1 Express your answer in 3 decimal points.

3- Sabendo que \( \operatorname{cotag} 40^{\circ}=1,1918 \) e \( \cos 43^{\circ}=0,7314 \), determine. a) \( \operatorname{Cotag} 320^{\circ}= \) b) \( \cos 223^{\circ}= \)