sin30°÷(1- cos30°)+tan75°=?

sin30°÷(1- cos30°)+tan75°=?

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（1）1/2 sin60°＋2/√2 cos45°＋sin30°•cos30°=√3/4+1+√3/4=1+√/3/2

Why is the square of sin30 + the square of cos30 = 1

∵sin30°=1/2,∴sin²30°=（1/2）²=1/4,
From cos 30 ° = √ 3 / 2, ν cos? 30 ° = (√ 3 / 2) = 3 / 4,
∴sin²30°+cos²30°=1/4+3/4=1.
In fact, no matter how much x is, sin? X+cos? X=1

Sin30 degree is equal to 0.5, cos 45 degree is equal to the root of two. Can these values confirm that a triangle must be a right triangle? RT

These values do not determine that the triangle must be a right triangle
If the three angles of a triangle are 30 and 45105 degrees respectively, it is not a right triangle

>>>Sin30 degrees

It refers to the sine value of an angle of 30 °, that is, the ratio of the opposite side to the hypotenuse of the angle (30 ° angle) in a right angle triangle with 30 ° angle

[emergency] sin30 = 1 / 2. How is this calculated

The opposite side of 30 ° of a right triangle is 1, and the hypotenuse is 2, which is half of the hypotenuse
Sin30 degree = opposite / bevel = 1 / 2

What's the approximate degree of root six plus root two?

Quarter root six plus root two = sin75 degrees

How many degrees is the root two of cos

The value of cosine is two quarter root, so this angle is 69.298 degrees

Sin30 ° - the root of 2 cos45 ° + 1 / 3

Sin30 ° - the root of 2 cos45 ° + 1 / 3
=(1/2)-(√2/2)*(√2/2)+1/3
=1/2-1/2+1/3
=1/3

sin45°×cos45°-sin30°

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