Question

solve:

tan 10° tan 15°tan75° tan80°



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Answer 1

Answer:

tan 10 tan 15 tan ( 90 - 75 ) tan ( 90 - 80 )

= tan 10 tan 15 cot 15 cot 10

Step-by-step explanation:

we know that tan theta * cot theta = 1

so tan 10 cot 10 tan 15 cot 15 = 1

Answer 2

QUESTION:-

solve:

solve: tan 10° tan 15°tan75° tan80°

SOLUTION:-

Use The Ratios↓

Tan∅=Cot(90-∅)

=>Cot80°×Cot75°×Tan75°×Tan80°

Using Trignometric Ratios↓

Tan=$\frac{1}{cot}$ or cot= $\frac{1}{tan}$

=> $\frac{1}{Tan80°}$×$\frac{1}{Tan75°}$×Tan75°×Tan80°

=>All is = 1

$\mathcal{BE \: BRAINLY}$