Question

Q7. It coto 7/8, evaluate

1. (1+sino)(1-sino)
(1+coso)(1-coso)
2 coto²​

Answer 1

Verified Answer

$\rm (1+sino)(1-sino) + </p><p>(1+coso)(1-coso) + </p><p>2 coto²$

$\rm 1 - {sin o}^{2} + 1 - {coso}^{2} + {2coto}^{2}$

$\rm {coso}^{2} + {sino}^{2} + 2 {coto}^{2}$

$\rm 1 + {2coto}^{2}$

$\rm 1 + 2 \times {( \frac{7}{8} ) }^{2}$

$\rm 1 + 2 \times \frac{49}{64}$

$\rm 1 + \frac{49}{32}$

$\rm \frac{32 + 49}{32}$

$\rm \frac{81}{32}$

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