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Popular >

simplify cos(90+a)

Solution

simplify

cos (9 0^{\circ} + a)

Solution

- sin (a)

Solution steps

cos (9 0^{\circ} + a)

Rewrite using trig identities

= - sin (a)

Popular Examples

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cos (- sin (x))

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sin (θ - 9 0^{\circ})

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cos (arcsin (13 x))

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sin (t - \frac{π}{2})

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tan (\frac{π}{2} - θ)

Frequently Asked Questions (FAQ)

What is cos(90+a) ?
The solution to cos(90+a) is -sin(a)