The value of cos^2 63º - sin^2 27°
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Answered by
2
Answer:
sin²27° = sin²(90-63°)
= cos²63°
so, cos²63°- sin²27°= cos²63°-cos²63°=0
hope this helps...
Answered by
1
cos^2 63º - sin^2 27°
= cos² 63° - sin² 27°
= cos² (90° - 27°) - sin² 27°
[as, (90° - 27°) = 63°]
= sin² 27° - sin²27°
[as, son ∅ = cos (90° - ∅)]
= 0.
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