Which of the following statements is true?
1 answer:
Answer:
The answer is d.
Step-by-step explanation:
As we know , sin x = cos ( 90 ° - x )
sin 18° = cos (90°-18°)
= cos 72°.
Similarly, sin 72°= cos (90°-72°)
= cos 18°
But, sin 55°= cos (90°-55°)
= cos 35°
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