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Sagot :
The tangent theta is a Trigonometric function, the simplified value of 1 + tan²θ is sec²θ.
What is Trigonometry function ?
Trigonometric functions are also called circular functions. They are easily defined as functions of triangle angles. This means that the relationships between the angles and sides of triangles are given by these trigonometric functions. The basic trigonometric functions are sine, cosine, tangent, cotangent, secant and cosecant. Also read the triangle identity here.
We have given an expression, 1 + tan²θ
we know that , tanθ = sinθ /cosθ
sin²θ + cos²θ =1 and 1/cosθ = secθ
Now, 1 + tan²θ = 1 + sin²θ/cos²θ
taking LCM cos²θ
=> 1 + tan²θ = (cos²θ + sin²θ )/cos²θ
=> 1 + tan²θ = 1/cos²θ
=> 1 + tan²θ = sec²θ
Hence, the required expression is sec²θ.
To learn more about Trigonometric functions, refer :
https://brainly.com/question/25618616
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