Evaluate: tan100°+tan125°+tan100°tan125°
0
12
-1
1
Explanation for the correct option:
We know that,
100°+125°=225°
Take tan on both sides, we have
⇒tan100°+125°=tan225°
Using the formula, tana+b=tana+tanb1-tanatanb
⇒tan100°+tan125°1-tan100°tan125°=1∵tan225°=1⇒tan100°+tan125°=1-tan100°tan125°⇒tan100°+tan125°+tan100°tan125°=1
Hence, the correct answer is option (D).
Evaluate:-87+-31--8.
Evaluate: -41-9-16--5
Evaluate:
-20+-22
Evaluate
-483--287