Question

prove that sin^2theta+cos^2theta==1​

Answer 1

Here is the solution mate Mark as brainliest please ✌✌

Answer 2

Step-by-step explanation:

in a triangle right angled ABC where ∠B is 90°

take ∠A

sin A = BC/AC

sin²A = BC²/AC²

cos A = AB/AC

cos²A = AB²/AC²

add them

sin²A + cos²A = AB²/AC²  +  BC²/AC²

                       = (AB²+BC²)/AC²

                       = (AC²)/AC² = 1

sin²A + cos²A = 1

hence proved

hope this helps

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