Question

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evaluate the following
1) (sin 25/cos65)²-(cos61/sin29)²
2)(sin47/cos63)²+(cos41/
cos49)²
3)(sin20/cos70)²+(cos31/sin59)²​

Answer 1

Answer:

(sin(90-65)/cos65)^2-(cos(90-29)/sin29)^2

(cos65/cos65)^2-(sin29/sin29)^2

1^2-1^2

1-1

0

Hope it helps........