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Popular >

simplify cos(a-90)

Solution

simplify

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

Solution

sin (a)

Solution steps

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

Rewrite using trig identities

= sin (a)

Popular Examples

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cos (- y)

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cos (arctan (\frac{t}{R}))

simplify cot(-90-α)simplify

cot (- 9 0^{\circ} - α)

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sin (2 x + 0.5 π + \frac{π x}{2})

simplify csc(1+tan^2(θ))simplify

csc (1 + tan^{2} (θ))

Frequently Asked Questions (FAQ)

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