Question

Find the value of Cosec²67°-tan²23.

Answer 1

Step-by-step explanation:

(cosec²67°- tan²23°)/(sin²17° + sin²73°)

=[cosec²(90°-23°) -tan²23°]/[sin²(90°-73°) +sin²73°]

=(sec²23° - tan²23°)/(cos²73° + sin²73°)

=1/1

=1

5.0