Math, asked by ambesingh70077, 10 months ago

Figure-6
Evaluate :
cos 72º/sin18°+ sin11°/cos79°-tan 15° tan 75°

Answers

Answered by saurabh2789

4

Answer:

1

Step-by-step explanation:

cos72°/sin72+sin11/sin11 - tan 15×cot15

1+1-1

reason

cos∅=sin(90-∅) and vice versa

tan∅=cot(90-∅)

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