Question

Please answer the above question.​

Answer 1

Step-by-step explanation:

h=√2a

sinA=1/√2

sec A=√2

cos2a+sin2a

=1/2+1/2

=1

hope it helps

thanx

Answer 2

Answer:

find hypotenuse first (AC)

Step-by-step explanation:

By PGT : (AC)^2 = a^2 + a^2

• AC = a ✓2
• sin A = P/H = a/ a✓2 = 1 / ✓2
• sec A = H/B= a✓2 / a = ✓2
• cos^2 A + sin^2 A = cos A = 1/secA = 1/✓2 = (1/✓2)^2 + (1/✓2)^2 = 1
• cos^2 A + sin^2 A = 1