Question

Prove that sin²o + cos²o = 1​

Answer 1

Answer:

Step-by-step explanation is there in the photo. Hope it will help you and others with the same doubt. ☺

Answer 2

This is only a single line proof and most easy one and other identity also get in the same way by divide by square of prependicular and square of base.

Hope you understand p/h is sin and b/h is cos which is used in above formula