Differentiation problem?
Hi, I have an equation I need to differentiate, but I'm not sure how;
x=2dtan(θr)cos(θi)
d is constant, θi and θr are angles of incidence and refraction, both varying. The question involves finding a maximum x for an angle θi, so I need to differentiate x with respect to θi.
x=2dtan(θr)cos(θi)
d is constant, θi and θr are angles of incidence and refraction, both varying. The question involves finding a maximum x for an angle θi, so I need to differentiate x with respect to θi.
Original post by around
If you only vary , then is constant, so just treat as a constant.
But varies as varies, so how can you treat is as a constant?
Original post by cameron95
But varies as varies, so how can you treat is as a constant?
And what rule connects them
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