Question

prove sin²a +cos²a =1​

Answer 1

Answer:

Hi Mate!!!

Take A as any angle

say A = 30°

Sin² ( 30 ) + Cos² ( 30 )

( 1 / 4 ) + 3 / 4

= 1

Answer 2

Answer:

Step-by-step explanation:

sin(a)=  p/h

squaring both side,

sin²a = p²/h²

cos(a) = b/h

by squaring both side

cos²a = b²/h²

adding both the eq.

sin²a + cos²a = p²/h² + b²/h² = 1  

because we know, p² + b² = h²