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Popular >

cos(arctan(9/40))

Solution

cos (arctan (\frac{9}{40}))

Solution

\frac{40}{41}

+1

Solution steps

cos (arctan (\frac{9}{40}))

Rewrite using trig identities:

cos (arctan (\frac{9}{40})) = \frac{1 + ( \frac{9}{40} ) ^{2}}{1 + ( \frac{9}{40} ) ^{2}}

= \frac{1 + ( \frac{9}{40} ) ^{2}}{1 + ( \frac{9}{40} ) ^{2}}

Simplify

= \frac{40}{41}

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Frequently Asked Questions (FAQ)

What is the value of cos(arctan(9/40)) ?
The value of cos(arctan(9/40)) is 40/41