Without using trignometric tables, evaluate: cos^2 26° + cos 64° sin 26° + tan 36° / cot 54°.
Answers
Answered by
167
cos^2 26+cos 64 sin 26+tan 36/cot 54
cos^2 26+sin(90-64) sin 26+tan 36/tan (90-54)
cos^2 26+sin26 sin26+tan 36/tan 36
cos^2 26+sin^2 26+1
1+1
2
cos^2 26+sin(90-64) sin 26+tan 36/tan (90-54)
cos^2 26+sin26 sin26+tan 36/tan 36
cos^2 26+sin^2 26+1
1+1
2
Answered by
58
cos^2 26+cos 64 sin 26+tan 36/cot 54
cos^2 26+sin(90-64) sin 26+tan 36/tan (90-54)
cos^2 26+sin26 sin26+tan 36/tan 36
cos^2 26+sin^2 26+1
1+1
2
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