CUET Preparation Today
CUET
General Test
Quantitative Reasoning
Trigonometry
Find the value of \(\frac{cos^212°\;+\;cos^278°}{sin^290°}\) .
3
1
-1
0
Formula → [cos2A + cos2B = 1, when A + B = 90°]
Here, (27° + 63° = 90°), therefore,
⇒ \(\frac{cos^212°\;+\;cos^278°}{sin^290°}\)
= \(\frac{1}{1}\)
= 1
