Question

if sinA=1/root2 Find sec^A-cos^a​

Answer 1

Answer:

$\sin \alpha = \frac{1}{ \sqrt{2} }$

$\sin \alpha = \sin45$

A=45°

$\sec \alpha = \frac{h}{b}$

$\sec \alpha = \sec45$

$\sec45 = \sqrt{2}$

$\cos \alpha = \cos45$

$\cos45 = \frac{1}{ \sqrt{2} }$

$\sec\alpha - \cos \alpha$

$= \sqrt{2} - \frac{1}{ \sqrt{2} }$

$= \frac{1}{ \sqrt{2} }$

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