Question

Write the sine and cosine values ​​of A, B, respectively, in the figure for (1) and (2) + explanation.

Answer 1

(1)

√(10^2 - 6^2) = 8

SIN(A) = COS(B) = 6/10

COS(A) = SIN(B) = 8/10

(2)

√(9^2 - 5^2) = 2·√14

SIN(A) = COS(B) = 2·√14 / 9 = 2/9·√14

COS(A) = SIN(B) = 5/9