evaluate cos75°/sin15°+SIN12°/COS78°-cos18°/sin72°
Answers
Answered by
41
cos 75= sin(90-75)= sin 15
similarly,
sin 12=cos 78
cos 18=sin 72
puting the value,
1+1-1
2-1
1
similarly,
sin 12=cos 78
cos 18=sin 72
puting the value,
1+1-1
2-1
1
Answered by
21
Answer:
1
Step-by-step explanation:
cos75/sin15+sin12/cos78-cos18/sin72
cos(90-75)/sin15+sin(90-12)/cos78-cos(90-18)/sin72
sin15/sin15+cos78/cos78-sin72/sin72
1+1-1
2-1
1
ans:- 1
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