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Express cot 85^@ +cos75^@in terms of tri...

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

Text Solution

Verified by Experts

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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