On the sine theorem and cosine definite of triangle In triangle ABC, if sin2a = sin2b, what triangle must triangle ABC be? The answer is isosceles or right triangle!

sin2A＝sin2B,
Then 2A = 2B or 2A + 2B = 180 degrees
A = B or a + B = 90 degrees
So triangle ABC is isosceles or right triangle

Sine theorem, cosine theorem, deformation formula

a2=b2+c2-2bccosA

Sine cosine theorem formula,

Trigonometric function formula: acute angle trigonometric function formula sin α= ∠ α Opposite / bevel cos α= ∠ α Adjacent / beveled edge Tan α= ∠ α Opposite side / ∠ α Adjacent edge cot α= ∠ α Adjacent edge / ∠ α The opposite side angle doubling formula sin2a = 2sina • cosacos2a = cosa ^ 2-sina ^ 2 = 1-2sina ^ 2 = 2CO

Sine theorem, cosine theorem, formula and language description,

Sine theorem: in a triangle, the ratio of each side to the sine of its diagonal is equal
Cosine theorem: for any triangle, the square of either side is equal to the sum of the squares of the other sides minus twice the cosine of the angle between these two sides and them

Find all formulas of high school sine and cosine theorem (must be all)

Pro, the sine and cosine theorem is just two theorems
Positive: A / Sina = B / SINB = C / sinc
Remainder: square a = square B + square C -2abcos included angle
b. C similarly, there are three forms of the same

Can we find the period of trigonometric function directly with 2 π / W?

First of all, make sure that the function has been simplified, and the simplified function should only be sine function or cosine function, so that it can be used
2 π / W, come on

On the sine theorem and cosine definite of triangle In triangle ABC, if sin2a = sin2b, what triangle must triangle ABC be? The answer is isosceles or right triangle!