Question

Please help me in this question for 20 points.

Answer 1

taking sintheta ^2= sin 90 and cos theta^2 =cos 90

sin90 + cos 90

sin 90= 0

cos 90=1

so, sin90+ cos90= sin theta^2+ cos theta ^2

0+1=1

hence proved

hope that helped

plzz mark as brainliest

Answer 2

Mark as brainliest it’s only one angle taken but with values of cos theta and sin theta. Suppose in right triangle abc, b=90 then it is only used as theta for both sin and cod respectively