sin square theta + cos square theta = 1 How to prove?

Why does sine squared plus cosine squared equal 1?

(1 + sin theta)/ cos theta + cos theta / (1 + sin theta) = 2 sec theta, verify the identity

Sin theta/1+Cos theta + 1+Cos theta / Sin theta = 2 Cosec theta | Mathematics Class 10 | Identity

Basic Trigonometric Ratios:tan(theta), cot(theta), sin(theta), cos(theta), sec(theta), cosec(theta)

If `sin theta+cos theta=1,` then `sin theta cos theta` is equal to :

Class10||RD Sharma||Ex11.1 Qu34ii|| sintheta-cos theta+1/sin theta+cos theta-1=1/sectheta-tan Tamil

One Shot - Matrices & Determinants - 13 Problem types | JEE Mains 2025 | Shival Kathe-IITD

If `(costheta)/(1+sintheta)-(1-sintheta)/(costheta)=2k` then the value of `k` is :

sintheta-costheta+1/sintheta+costheta-1=1/sec theta-tan theta

If (cos theta + sin theta) =1 prove that (cos theta - sin theta) = + or - 1 || Trigonometry Class-10

Prove (tan@+sec@-1)÷(tan@-sec@+1)= (1+sin@)÷ cos@

If ` cos theta + sin theta =1 , ` prove that ` cos theta - sin theta = pm 1. `

Where do Sin, Cos and Tan Actually Come From - Origins of Trigonometry - Part 1

Show cos θ/(1 - sin θ) + (1 - sin θ)/cos θ = 2sec θ | Class 10 Trigonometry AP TS

If `cos theta + sin theta =1` prove that `cos theta -sin theta =+-1`

root ( 1 - cos theta )/(1+cos theta) = cosec theta - cot theta | Trigonometry class 10

Q6 | If sinθ – cosθ = 1/2 , then the value of sinθ + cosθ is | If sin theta - cos theta = 1/2 then

Q208 | Prove that tan theta + cot theta = 1 / sin theta cos theta

Prove that 1-cos theta/sin theta=sin theta/1+cos theta. Prove that sina/1-cosa=1+cosa/sina.