Question

sin square 40 degree + sin square 50 degree by cos square 20 degree + cos square 70 degree

Answer 1

Answer:

this is anwer

Answer 2

Answer:

answer is : 1

Step-by-step explanation:

[sin^2(40) + sin^2(50)]/[cos^2(20) + cos^2(70)]

[sin^2(90 - 50) + sin^2 (50)]/[cos^2(90 - 70) + cos^2(70)]

[cos^2(50) + sin^2(50)]/[sin^2(70) + cos^2(70)]

1/1 = 1                      [cos^2(α) + sin^2(β) = 1]

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