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Question Number 164483 by mathlove last updated on 18/Jan/22

$$\frac{cos25-sin65}{sin20+sin10}=?$$

Commented by som(math1967) last updated on 18/Jan/22

$$0$$

Answered by Rasheed.Sindhi last updated on 18/Jan/22

$$\frac{cos25-sin65}{sin20+sin10}$$$$=\frac{sin(90-25)-sin65}{sin20+sin10}$$$$=\frac{sin65-sin65}{sin20+sin10}$$$$=\frac{0}{sin20+sin10}=0$$$$$$

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