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Express `cot 85^o +cos75^o`in terms of trigonometric ratios of angles between `0^o`and `45^o`

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Express `cot 85^o +cos75^o`in terms of trigonometric ratios of angles between `0^o`and `45^o`
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Here, we will use
`cotx = tan(90-x)`
`cosx = sin(90-x)`
Now, our expression is,
`cot85^@+cos75^@ = tan(90^@-85^@)+sin(90^@-75^@)`
`tan5^@+sin15^@`
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