Question

evaluate:
(sin Teta+cos teta)^2+(cos teta-sin teta)^2​

Answer 1

Answer:

(sinA+cosA)²+(cosA-sinA) ²

sin²A+cos²A+2sinAcosA+cos²A+sin²A-2sinAcosA

2sin²A+2cos²A

2(sin²A+cos²A)

2(1)

2 answer

Step-by-step explanation:

here first we used identity (a+b) ² and (a-b) ² and then just solved it at the end we got 2(sin²A+cos²A) here sin²A+ cos²A=1 hence 2 is the final answer

thankyou

Answer 2

Solution:

See the picture below.

Hope it will help.