7 크
Prove
:= tan 8° tom 28 tan 45°
tan 62 tan 82° = 1
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Answer:
Formulas to be used -
- Formulas to be used -tan (90 - theta) = cot theta
- Formulas to be used -tan (90 - theta) = cot thetatan theta × cot theta = 1
Step-by-step explanation:
R.H.S = tan 8° tan 28° tan 45° tan 62° tan 82°
R.H.S = tan 8° tan 28° tan 45° tan 62° tan 82° = tan (90° - 82°) tan (90° - 62°) × 1 × tan 62° tan 82° (tan45° = 1)
R.H.S = tan 8° tan 28° tan 45° tan 62° tan 82° = tan (90° - 82°) tan (90° - 62°) × 1 × tan 62° tan 82° (tan45° = 1) = cot 82° cot 62° tan 62° tan 82°
R.H.S = tan 8° tan 28° tan 45° tan 62° tan 82° = tan (90° - 82°) tan (90° - 62°) × 1 × tan 62° tan 82° (tan45° = 1) = cot 82° cot 62° tan 62° tan 82° = 1 = L.H.S [ Proved]
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