
That's #-45^circ# in the fourth quadrant and #135^circ# in the second. We have #arctan(-1).# The negative slope means we're after the analogous triangles in the second and fourth quadrants.
Tan physics plus#
That's one of our two triangles, #45^circ # and #180^circ+45^circ=225^circ# plus their coterminal brethren. Tangents are slopes so that's all angles whose rays have a slope of #1#. The expression #arctan(1)# means all the angles whose tangents are #1#.

I really don't like the notation #tan^(-1) and arctan(-1).# So you only need to know two triangles, but you need to know them in each quadrant, or at least be able to figure them out. It seems insane to have a whole field about just two triangles, but once you accept it trig becomes easier. Trig students are only expected to know "exactly" the trig functions of two triangles, 30/60/90 and 45/45/90. $29.95 plus a whopping $9.My answer's a bit more jaded than the other answer. There’s the slightest DHA smell after showering this product off Smells like a gross household cleaner, with citrus undertones
Tan physics skin#
It has a gel consistency and a light brown, orangey tint.Īpplication is easy, the product blends into skin nicelyĭries extremely quickly under 10 minutes

bottle costs $29.95 (plus a whopping $9.95 for shipping and handling), which makes it nearly $40 a bottle.Īll in, that works out to $4.98 per ounce, which is just a little above average as far as most self tanners go. But if they can look past that, this product could be a winner for them. The only thing that may deter men from trying this product is the smell. There are some things men will like about this product: the color produced and speedy drying time being the top two. It fades a little splotchy in some areas, like many self tanners do. Tan Physics lasts abut 3-4 days, which is about average. This one was very ‘middle of the road’ as far as color goes.Īfter application, I didn’t notice much streakiness or blotchiness that some self tanners leave. If you’re looking for a dark tan, this probably isn’t the product for you. This product leaves you looking sun-kissed and bronzed, without having too much of that “orange” look. Tan Physics produced a very even, light/medium tan. The unpleasant odor intensified a bit a few hours after application.Īnd the next day I smelled a slight hint of DHA after showering this product off. Smell (After Several Hours And The Next Day) It’s not the absolute worst smelling self tanner, but it was far from smelling “nice”. You can tell it was meant to smell like citrus, but it smells more like chemicals than orange or lemon. The smell of Tan Physics is not a pleasant one to me it smelled like household cleaner. Since the tint is so light and the drying time is so fast, there wasn’t much of an issue with this product rubbing off on sheets or clothing. Once on your body it doesn’t feel too stickyl and you won’t have to wait long before dressing or climbing into bed. The best part about Tan Physics is the drying time, which is under 10 minutes! It wasn’t very messy applying this product, as it quickly absorbs into your body. The smooth gel consistency makes it easy to apply. Tan Physics has a light tint to it, but the tint doesn’t act as a guide as it quickly blends into your skin upon application. Tan Physics comes out a light brown, orangey color, almost like clay. Taking everything into consideration, we gave this product 2.5 out of 5 stars.

The biggest drawback of this product is the smell, which is kind of like a gross kitchen cleaner. It also produces a nice, light-medium colored tan (although it’s definitely on the light side). It dries faster than most products we’ve tried, which is a HUGE plus. Overall, Tan Physics is an average self tanner. With that said, let’s talk about the product itself… It’s only sold online, and to get to their order form you have to give them your email address and name each time you order.Īnd then you’re hit with a several other offers for their exfoliator, tan extender, etc. Before we get to what we like and don’t like, I will say it’s a hassle actually ordering Tan Physics.
