Question

i.cos 72°/sin 18°
ii.1/2 sin 55°/cos 35°-cos 69°/sin 21°
iii.sin 55°-cos 35°
iv. cos 22°- sin 68°
v. sin^2 50°-cos^2 40°​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

i). cos 72 / sin 18

= cos (90-18) / sin 18

= sin 18 /sin 18

=1